Fluid management assembly

ABSTRACT

A fluid management assembly. The fluid management assembly comprises a valve body, a first chamber, a second chamber, a first flow passage, a second flow passage, a third flow passage and a fourth flow passage, wherein the first flow passage, the second flow passage and the third flow passage have openings in an outer wall of the valve body; the valve body is provided with the second chamber, the second flow passage and a first passage; and the first passage can communicate the first chamber and the second chamber. The fluid management assembly is provided with a plurality of channels, the first chamber and the second chamber.

This disclosure is a national phase application of PCT international patent application PCT/CN2020/096757, filed on Jun. 18, 2020, which claims the priority of Chinese Patent Application No. 201910549205.8, titled “FLUID MANAGEMENT ASSEMBLY”, filed with the China National Intellectual Property Administration on Jun. 24, 2019, which is incorporated herein by reference in its entirety.

FIELD

The present disclosure relates to the technical field of fluid management.

BACKGROUND

Functional components in a thermal management system are connected into a system by pipelines. The pipeline with a great length may result in the fluid flow resistance increasing relatively, which is adverse for the fluid to flow in the system when the thermal management system is in operation.

SUMMARY

An object according to the present disclosure is to provide a fluid management assembly, which is beneficial of solving the above problems.

In one aspect, a fluid management assembly is provided according to an embodiment of the technical solution of the present disclosure, which includes a valve body and a first valve core. The fluid management assembly further includes a first chamber and a second chamber, a wall forming the second chamber includes an inner wall of the valve body; the first valve core is arranged in the first chamber, the first valve core is rotatable in the first chamber, the first valve core has a conduction passage, the fluid management assembly includes a throttle chamber, and the throttle chamber or the conduction passage is configured to communicate the first chamber with the second chamber.

The fluid management assembly includes a first flow passage, a second flow passage, a third flow passage and a fourth flow passage, the first flow passage, the second flow passage and the third flow passage have openings in an outer wall of the valve body, the first flow passage is in communication with the first chamber, and the throttle chamber or the conduction passage is configured to communicate the fourth flow passage with the first chamber; the second flow passage is in communication with the second chamber, and the third flow passage is provided with a first opening of the third flow passage in the wall of the second chamber.

In another aspect, a fluid management assembly is provided according to another embodiment of the technical solution of the present disclosure, which includes a valve body and a first valve core. The fluid management assembly includes a first chamber and a second chamber, the valve body is provided with the second chamber; the first valve core is arranged in the first chamber, the first valve core is rotatable in the first chamber, the fluid management assembly includes a throttle chamber, and the first chamber is configured to be in communication with the second chamber through the throttle chamber.

The fluid management assembly includes a first flow passage, a second flow passage and a third flow passage, the first flow passage is in communication with the first chamber; the second flow passage is in communication with the second chamber; the third flow passage is provided with a first opening of the third flow passage in a wall of the second chamber; the third flow passage includes a communication portion, the communication portion is provided with a second opening of the third flow passage in an outer wall of the valve body; the fluid management assembly further includes a throttle portion, and the throttle portion is a part of the third flow passage.

The fluid management assembly includes the valve body, the first chamber, the second chamber, the first flow passage, the second flow passage and the third flow passage, the first flow passage, the second flow passage and the third flow passage have the openings in the outer wall of the valve body, the first chamber is configured to be in communication with the second chamber through the throttle passage; multiple passages and chambers are provided in the fluid management assembly, which can relatively reduce pipeline connections between functional components and is beneficial of relatively reducing the fluid flow resistance.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic three-dimensional structural view of a first embodiment of a fluid management assembly;

FIG. 2 is a schematic top structural view in FIG. 1 ;

FIG. 3 is a schematic cross sectional structural view of a first embodiment taken along line A-A in FIG. 2 ;

FIG. 4 is a schematic three-dimensional structural view of a planetary assembly viewed from a first visual angle;

FIG. 5 is a schematic three-dimensional structural view of the planetary assembly viewed from a second visual angle;

FIG. 6 is a schematic three-dimensional structural view of a first valve seat;

FIG. 7 is a schematic three-dimensional structural view of a first embodiment of the first valve core;

FIG. 8 is a schematic top view of a first valve core;

FIG. 9 is schematic cross-sectional view taken along line B-B in FIG. 7 ;

FIG. 10 is a schematic projection view of a first embodiment of a throttle passage and a matching surface of a valve seat in a first surface;

FIG. 11 is a schematic projection view of a second embodiment of the throttle passage and the matching surface of the valve seat in the first surface;

FIG. 12 is a schematic three-dimensional structural view of a second valve body in FIG. 1 ;

FIG. 13A is a schematic three-dimensional structural view of a first valve body in FIG. 1 viewed from the first visual angle;

FIG. 13B is a schematic three-dimensional structural view of the first valve body in FIG. 1 viewed from the second visual angle;

FIG. 14 is a schematic three-dimensional structural view of a check valve component;

FIG. 15 is a schematic cross-sectional view of FIG. 14 ;

FIG. 16 is a schematic view showing the positional relationship of a first passage, a second chamber, a conduction pipe and a first cross section;

FIG. 17 is a schematic sectional view of a second embodiment taken along line A-A in FIG. 2 ;

FIG. 18 is a schematic sectional view of a third embodiment taken along line A-A in FIG. 2 ;

FIG. 19 is a schematic three-dimensional structural view of a second embodiment of the fluid management assembly;

FIG. 20 is a schematic top structural view of FIG. 19 ;

FIG. 21 is a schematic cross-sectional view of a first embodiment taken along line C-C in FIG. 20 ;

FIG. 22 is a schematic cross-sectional view taken along line F-F in FIG. 20 ;

FIG. 23 is a schematic three-dimensional structural view of a second valve body in FIG. 19 ;

FIG. 24 is a schematic three-dimensional structural view of a first valve body in FIG. 19 ;

FIG. 25 is a schematic top structural view in FIG. 23 ;

FIG. 26 is a schematic cross-sectional view taken along line D-D in FIG. 24 ;

FIG. 27 is a schematic cross-sectional view of a third embodiment of the fluid management assembly;

FIG. 28 is a schematic cross-sectional view of a fourth embodiment of the fluid management assembly;

FIG. 29 is a schematic three-dimensional structural view of a fifth embodiment of the fluid management assembly;

FIG. 30 is a schematic cross-sectional view of FIG. 29 ;

FIG. 31 is a schematic view showing the connection of a first embodiment of a thermal management system;

FIG. 32 is a schematic view showing the connection of a second embodiment of the thermal management system;

FIG. 33 is a schematic view showing the connection of a third embodiment of the thermal management system;

FIG. 34 is a schematic operation view of a first heating mode of the thermal management system in FIG. 31 ;

FIG. 35 is a schematic operation view of a cooling mode of the thermal management system in FIG. 31 ;

FIG. 36 is a schematic operation view of a second heating mode of the thermal management system in FIG. 31 ;

FIG. 37 is a schematic operation view of a third heating mode of the thermal management system in FIG. 31 ;

FIG. 38 is a schematic front structural view in FIG. 1 ;

FIG. 39 is a schematic cross-sectional view taken along line E-E in FIG. 38 , in which the first valve core is arranged in a third operation position;

FIG. 40 is a schematic cross-sectional view taken along line E-E in FIG. 38 , in which the first valve core is arranged in a first operation position;

FIG. 41 is a schematic cross-sectional view taken along line E-E in FIG. 38 , in which the first valve core is arranged in a second operation position;

FIG. 42 is a schematic cross-sectional view taken along line E-E in FIG. 38 , in which the first valve core is arranged in a fourth operation position;

FIG. 43 is a schematic three-dimensional view of a first embodiment of a valve bonnet in FIG. 3 ;

FIG. 44 is a schematic three-dimensional structural view of a second embodiment of the valve bonnet;

FIG. 45 is a schematic partial enlarged view of FIG. 3 ;

FIG. 46 is a schematic view showing the connection of the valve bonnet and a first opening portion;

FIG. 47 is a schematic structural view of a second embodiment of the first valve core viewed from the first visual angle;

FIG. 48 is a schematic cross-sectional view taken along line D-D in FIG. 47 ;

FIG. 49 is a schematic enlarged view of C portion in FIG. 48 ; and

FIG. 50 is a schematic structural view of the second embodiment of the first valve core viewed from the second visual angle.

DETAILED DESCRIPTION OF THE EMBODIMENTS

A fluid management assembly according to the technical solution of the present disclosure may be in many manners, some of which can be applied to a vehicle thermal management system, and some can be applied to other thermal management system including a household thermal management system or a commercial thermal management system, etc. A fluid management assembly for vehicles is particularly described with reference to the drawings hereinafter.

Referring to FIGS. 1 to 16 and 38 to 44 , a fluid management assembly 10 includes a control unit, a transmission device 2000, a valve body 3000 and a first valve core 5000. In the technical solution of the present disclosure, the control unit is a driving mechanism 1000, and the transmission device 2000 is arranged between the driving mechanism 1000 and the valve body 3000. The driving mechanism 1000 includes a motor unit 1100, a sleeve 1200 and a connecting seat 1300, and one end of the connecting seat 1300 is fixedly connected to the sleeve 1200 and a connection between the connecting seat 1300 and the sleeve 1200 is sealed. The motor unit 1100 includes a stator 1110, a motor shaft 1130 and a rotor 1120, the stator 1110 is sleeved outside the sleeve 1200, the rotor 1120 is fixedly connected to the motor shaft 1130, at least part of the rotor 1120 is arranged inside the sleeve 1200, and the motor shaft 1130 passes through a through hole of the connecting seat 1300. After energization, the rotor 1120 is rotated under the action of the excitation magnetic field generated by the stator 1110, and drives the motor shaft 1130 to rotate. The transmission device 2000 includes a gear box 2100, a planetary assembly 2200 and a valve stem 2300. A step provided at one end of the gear box 2100 is fixedly connected to the connecting seat 1300 and is formed with a step hole. The connecting seat 1300 is threadly connected to or sealingly welded to the step. In addition, a sealing member may be provided at a connection for improving the sealing performance when the connecting seat 1300 is threadly connected to the step. The other end of the gear box 2100 is fixedly connected to the valve body 3000, and the gear box 2100 may be sealingly welded to the valve body 3000, or the gear box 2100 may be threadly connected to the valve body 3000 with a sealing member being provided at the connection. The planetary assembly 2200 is arranged in a chamber formed by the gear box 2100, or the planetary assembly 2200 is arranged in a chamber formed by the gear box 2100, the connecting seat 1300 and/or the valve body 3000. The planetary assembly 2200 includes a sun gear 2210, multiple planet gears 2220, a gear shaft, a first gear ring 2230, a second gear ring 2240 and two mounting plates 2250. In this embodiment, the planetary assembly 2200 includes three planet gears 2220, which are in meshing connection with the sun gear 2210, both the first gear ring 2230 and a second gear ring 2240 have internal teeth. A part of each of the planet gears 2220 is meshed and connected with the internal teeth of the first gear ring 2230, and the other part of each of the planet gears 2220 is meshed and connected with the internal teeth of the second gear ring 2240. An outer side portion of the first gear ring 2230 is fixedly connected to the gear box 2100, for example, the first gear ring 2230 is relatively fixed to the gear box 2100 by interference fit or limiting fit. The planet gears 2220 and the sun gear 2210 are arranged between the two mounting plates 2250, and a through hole through which the motor shaft 1130 passes is defined on the mounting plate 2250 close to the driving mechanism 1000, so as to facilitate the cooperation of the motor shaft 1130 and the sun gear 2210.

Referring to FIGS. 3 to 5 , the second gear ring 2240 has a limiting portion 2241, and the limiting portion 2241 is arranged on a side of the second gear ring 2240 facing the valve body 3000. In this embodiment, the limiting portion 2241 is formed as two arc-shaped grooves, and the two arc-shaped grooves are arranged symmetrically relative to an axis of the second gear ring 2240. Accordingly, referring to FIG. 13 , the valve body 3000 is provided with limiting posts 3010 for cooperating with the limiting portion 2241. Similarly, the limiting posts 3010 are arranged symmetrically relative to the axis of the second gear ring 2240. The limiting posts 3010 are arranged in the arc-shaped grooves, and the rotation range of the second gear ring 2240 can be set by two ends of the limiting portion 2241. It can be known that the rotation range of the second gear ring 2240 is limited by setting an arc angle between the two ends of the limiting portion 2241, so as to limit a rotation range of the valve stem 2300. In this embodiment, the arc angle of the limiting portion 2241 is set to 90 degrees, and the arc angle of the limiting portion 2241 may be set adaptively according to different disclosure environments. One end of the valve stem 2300 extends into a center hole of the second gear ring 2240, and the valve stem 2300 is fixedly connected to the second gear ring 2240 by interference fit or welding. Alternatively, the valve stem 2300 may be connected to the second gear ring 2240 by injection molding.

In the case that the fluid management assembly 10 is in operation, when the motor shaft 1130 rotates, the sun gear 2210 rotates driven by the motor shaft 1130. Due to the meshing effect, the planet gears 2220 rotate driven by the sun gear 2210, the first gear ring 2230 is fixed and, the planet gears 2220 not only rotate around its own axis, but also rotate circumferentially around the sun gear 2210, so as to drive the second gear ring 2240 to rotate while the valve stem 2300 also rotates with the rotation of the second gear ring 2240. Since the limiting portion 2241 and the limiting posts 3010 are in mutual cooperating, the valve stem 2300 rotates within a certain range. The valve body 3000 includes a valve stem hole, in which part of the valve stem 2300 is arranged, and the valve stem 2300 is dynamically sealed with the valve stem hole. In addition, the fluid management assembly may further include a bush, the bush is embedded in the valve stem hole and fixed to the valve stem hole, the valve stem 2300 is sleeved in the bush, and the valve stem 2300 is dynamically sealed with the bush. Referring to FIG. 3 , the fluid management assembly 10 includes a first chamber 100 and a second chamber 200, the first chamber 100 can be in communication with the second chamber 200, the first valve core 5000 of the fluid management assembly 10 is arranged in the first chamber 100, and the first valve core 5000 is rotatable in the first chamber 100.

Referring to FIGS. 3 and 39 , the fluid management assembly 10 includes a first flow passage 300, a second flow passage 400 and a third flow passage 500. The first flow passage 300 is provided with a first connecting port 1 in an outer wall of the valve body 3000, the second flow passage 400 is provided with a second connecting port 2 in the outer wall of the valve body 3000, and the third flow passage 500 is provided with a third connecting port 3 in the outer wall of the valve body 3000. The first flow passage 300 is in communication with the first chamber 100, the third flow passage 500 can be in communication with the second chamber 200, and the second flow passage 400 is in communication with the second chamber 200. In one or more embodiments of the technical solution of the present disclosure, the first flow passage 300 is an inlet passage of the first chamber 100, the second flow passage 400 is an outlet passage of the second chamber 200, and the third flow passage 500 is another outlet passage of the second chamber 200. The fluid management assembly 10 further includes a conduction pipe 700, and the second flow passage 400 includes a chamber formed by the conduction pipe 700. In this embodiment, the conduction pipe 700 is integrally arranged with the valve body 3000, a first port 701 of the conduction pipe 700 faces a bottom wall of the second chamber 200 and is in communication with the second chamber 200. In the technical solution of this embodiment, an axis direction of the conduction pipe 700 is oriented in an upward and downward direction, where the first port 701 of the conduction pipe 700 faces downward. Accordingly, a wall of the second chamber 200 that the first port 701 of the conduction pipe 700 faces is the bottom wall of the second chamber 200.

Referring to FIGS. 1, 3 and 43 , the fluid management assembly 10 further includes a valve bonnet 4000, the valve body 3000 includes a first opening portion 3110, and the first opening portion 3110 is recessed from a side wall of the valve body 3000 toward an interior of the valve body 3000. The first opening portion 3110 has an opening in the side wall of the valve body 3000, at least part of the valve bonnet 4000 is arranged in a chamber formed by the first opening portion 3110, and the valve bonnet 4000 is fixedly arranged with the first opening portion 3110. Specifically, the fluid management assembly 10 includes a connecting device, the connecting device includes a connecting portion 4410 and a matching portion 3111, the connecting portion 4410 is formed in the valve bonnet 4000, and the matching portion 3111 is formed in a wall of the first opening portion 3110. In a specific embodiment, the matching portion 3111 is formed with an internal thread on the first opening portion 3110, the connecting portion 4410 is provided with an external thread in an outer wall of the valve bonnet 4000, and the internal thread of the first opening portion 3110 cooperates with the external thread of the valve bonnet 4000 so as to fix the valve bonnet 4000 and the first opening portion 3110. In other embodiments, the fluid management assembly 10 further includes a snap ring, the connecting portion is provided with a groove in the outer wall of the valve bonnet, and the matching portion is provided with a groove in the wall of the first opening portion. After the snap ring arranged in the groove of the connecting portion reaches a predetermined position, the snap ring opens, and part of the snap ring is arranged in the groove of the first opening portion, so as to fix the valve bonnet 4000 and the valve body 3000.

The fluid management assembly 10 further includes a first accommodating chamber, a second accommodating chamber and a sealing member. The sealing member is arranged in the first accommodating chamber and the second accommodating chamber. The first accommodating chamber is closer to the first valve core than the second accommodating chamber, and the first accommodating chamber and the second accommodating chamber surround a circumferential side of the valve bonnet. In a specific embodiment, the first accommodating chamber is formed as a first groove 4130, the second accommodating chamber is formed as a second groove 4210, or the first accommodating chamber includes a chamber formed by the first groove 4130, the second accommodating chamber includes a chamber formed by the second groove 4210, and the first groove 4130 and the second groove 4210 are circumferentially distributed along an outer side wall of the valve bonnet 4000. The second groove 4210 is arranged between an outer end wall 4010 of the valve bonnet 4000 and the external thread of the valve bonnet 4000, the first groove 4130 is arranged between an inner end wall 4020 of the valve bonnet 4000 and the external thread of the valve bonnet 4000, and the sealing member is arranged in the first groove 4130 and the second groove 4210 of the valve bonnet 4000. The two grooves of the valve bonnet 4000, the sealing member and the first opening portion 3110 cooperate with each other, so as to realize the sealing between the valve bonnet 4000 and the first opening portion 3110. In other embodiments, the grooves for placing the sealing member may be arranged in the first opening portion 3110, so as to realize the sealing between the valve bonnet 4000 and the first opening portion 3110. In addition, the valve bonnet 4000 may be sealingly fixed to the first opening portion 3110 by welding, which will not be described in detail.

Referring to FIGS. 3 and 43 , the valve bonnet 4000 includes a first communication passage 4300, the first communication passage 4300 is provided with a first opening 4301 of the first communication passage 4300 in the inner end wall 4020 of the valve bonnet 4000, and the first communication passage 4300 is provided with a second opening 4302 of the first communication passage 4300 in a side wall of the valve bonnet 4000. Specifically, the valve bonnet 4000 includes a first hole 4110 and a second hole 4120, and a chamber formed by the first hole 4110 is in communication with a chamber formed by the second hole 4120. In this embodiment, the first communication passage 4300 includes the chamber formed by the first hole 4110 and the chamber formed by the second hole 4120, and an axis of the first hole 4110 is parallel to an axis of the first opening portion 3110, and the term “parallel” here means that an included angle between the axis of the first hole 4110 and the axis of the first opening portion 3110 is within ±10 degrees. An axis of the second hole 4120 is perpendicular to the axis of the first opening portion 3110, and the term “perpendicular” here means that an included angle between the axis of the second hole 4120 and the axis of the first opening portion 3110 ranges from 80 degrees to 90 degrees. Alternatively, an included angle between the axis of the second hole 4120 and the axis of the first hole 4110 may range from 45 degrees to 135 degrees. An opening of the first hole 4110, that is, the first opening 4301 of the first communication passage 4300, is formed in the inner end wall of the valve bonnet 4000. An opening of the second hole 4120, that is, the second opening 4302 of the first communication passage 4300, is formed in the side wall of the valve bonnet 4000. In an axial direction of the first opening portion 3110, the opening of the second hole 4120 is arranged between the first groove 4130 and the second groove 4210, which can avoid fluid leakage. It can be known that a wall forming the first chamber 100 includes a partial wall of the first opening portion 3110 and the inner end wall of the valve bonnet 4000. In other embodiments, the wall forming the first chamber 100 may not include the inner end wall of the valve bonnet 4000. In this embodiment, the valve bonnet 4000 includes a first sub valve bonnet 4100 and a second sub valve bonnet 4200. The first sub valve bonnet 4100 is separately arranged with the second sub valve bonnet 4200, and the first sub valve bonnet 4100 is closer to the first valve core 5000 than the second sub valve bonnet 4200. The first sub valve bonnet 4100 includes the first hole 4110 and the second hole 4120, the opening of the first hole 4110 is the first opening 4301 of the first communication passage 4300, and the first opening 4301 is arranged on an inner end wall of the first sub valve bonnet 4100. The opening of the second hole 4120 is the second opening 4302 of the first communication passage 4300, and the second opening 4302 is arranged on a side wall of the first sub valve bonnet 4100. The second sub valve bonnet 4200 has an external thread, which cooperates and is fixed to the internal thread of the first opening portion 3110, and an outer end wall of the first sub valve bonnet 4100 abuts against an inner end wall of the second sub valve bonnet 4200. The first groove 4130 is arranged in the side wall of the first sub valve bonnet 4100, and the second groove 4210 is arranged in a side wall of the second sub valve bonnet 4200.

Referring to FIGS. 43 to 46 , the fluid management assembly 10 includes a limiting device. The limiting device includes a limiting recess 4140 and a limiting pin 3112, the limiting recess 4140 has an opening in the side wall of the first sub valve bonnet 4100, at least part of the limiting pin is arranged in the limiting recess 4140, and the limiting pin 3112 is integrated or separately arranged with the valve body 3000. In a specific embodiment, the limiting recess 4140 has openings in the side wall of the first sub valve bonnet 4100 and the inner end wall of the first sub valve bonnet 4100, and the opening of the limiting recess 4140 in the side wall of the first sub valve bonnet 4100 is in communication with the opening of the limiting recess 4140 in the inner end wall of the first sub valve bonnet 4100. The limiting pin 3112 is integrated with the valve body 3000, and the limiting pin 3112 protrudes from a side wall of the first opening portion 3110 toward the first sub valve bonnet 4100. When mounting the valve bonnet 4000, the limiting recess 4140 cooperates with the limiting pin 3112, the first sub valve bonnet 4100 is placed in a predetermined position, and then the second sub valve bonnet 4200 is tightened, which can prevent the first sub valve bonnet 4100 from deviating from the predetermined position, and facilitate the positioning of the second opening 4302 of the first communication passage 4300. Alternatively, the second sub valve bonnet 4200 may be integrated with the first sub valve bonnet 4100, which relatively reduces the mounting steps. In other embodiments, the limiting recess 4140 includes a first limiting recess 4141 and a second limiting recess 4142, the first limiting recess 4141 is provided with an opening at least in the outer end wall of the first sub valve bonnet 4100, and the opening of the first limiting recess 4141 in the outer end wall of the first sub valve bonnet 4100 is integrated with an opening of the first limiting recess 4141 in the side wall of the first sub valve bonnet 4100. The first opening portion 3110 includes a step wall 3313, the second limiting recess 4142 has openings in the step wall 3313 and the side wall of the first opening portion 3110, and the opening of the second limiting recess 4142 in the step wall 3313 is integrated with the opening of the second limiting recess 4142 in the first opening portion 3110. The limiting pin 3112 is separately arranged with the valve body 3000, and the limiting pin 3112 is arranged in the first limiting recess 4141 and the second limiting recess 4142.

Referring to FIG. 3 and FIGS. 6 to 8 , the fluid management assembly 10 includes a valve seat. Specifically, the valve seat includes a first valve seat 6100 and a second valve seat 6200. The first valve core 5000 has a spherical or quasi-spherical structure, and the first valve core 5000 may have a cylindrical structure. The first valve core 5000 includes a matching groove 5300 matching with the valve stem 2300, the valve stem 2300 can extend into the matching groove 5300, and the valve stem 2300 can drive the first valve core 5000 to rotate. The first valve core 5000 is arranged between the first valve seat 6100 and the second valve seat 6200 in the axial direction of the first opening portion 3110, and both the first valve seat 6100 and the second valve seat 6200 have matching surfaces matching with the first valve core 5000. In a case that the first valve core 5000 is spherical or quasi-spherical, the matching surfaces are correspondingly arc-shaped surfaces, the matching surfaces of the valve seat may be protruded toward the first valve core 5000, or may be recessed from the first valve core 5000. An outer wall of the first valve core 5000 abuts against at least part of the matching surface 6120 of the first valve seat, and the outer wall of the first valve core 5000 abuts against at least part of the matching surface of the second valve seat 6200, the first valve core 5000 is slidable relative to the matching surface 6120 of the first valve seat, and the first valve core 5000 is dynamically sealed with the matching surface 6120 of the first valve seat. The first valve core 5000 is slidable relative to the matching surface of the second valve seat 6200, and the first valve core 5000 is dynamically sealed with the matching surface of the second valve seat 6200. It can be known that, the wall forming the first chamber 100 includes the inner end wall of the valve bonnet 4000, a bottom wall of the first opening portion 3110 and part of the side wall of the first opening portion 3110, or the wall forming the first chamber 100 includes the inner end wall of the valve bonnet 4000, the bottom wall of the first opening portion 3110, part of the side wall of the first opening portion 3110, the matching surface 6120 of the first valve seat and the matching surface of the second valve seat 6200. Referring to FIGS. 3 and 6 , the first valve seat 6100 has a passage 6110 extending through the first valve seat, the passage 6110 of the first valve seat is provided with a first opening of the passage of the first valve seat on the matching surface 6120 of the first valve seat. It can be known that the matching surface 6120 of the first valve seat is an annular arc-shaped surface, the passage 6110 of the first valve seat has openings in both the matching surface and a side facing the first communication passage 4300, so that the passage 6110 of the first valve seat is in communication with the first communication passage 4300. Similarly, the second valve seat 6200 has a passage extending through the second valve seat 6200, the passage of the second valve seat 6200 has openings in the matching surface of the second valve seat 6200 and another side of the second valve seat 6200, and the passage of the second valve seat 6200 is provided with a first opening of the passage of the second valve seat 6200 in the matching surface of the second valve seat 6200. It can be known that the matching surface of the second valve seat 6200 is an annular arc-shaped surface, and the passage of the second valve seat 6200 can be in communication with the second chamber 200.

The first valve seat 6100 may be integrated with the valve bonnet 4000, and the second valve seat 6200 is integrated with the first opening portion. The “integrated with” herein includes “being fixed as a whole” and “being integrally formed”. Specifically, the first valve seat 6100 is sealingly fixed as a whole or is assembled and extruded as a whole with the inner end wall of the valve bonnet 4000. More specifically, the inner end wall of the valve bonnet 4000 is formed as a step for placing the first valve seat 6100, or in other words, at least part of the first valve seat 6100 is arranged at the step of the valve bonnet 4000. Accordingly, the opening of the first hole 4110 is formed at the step of the valve bonnet 4000. The fluid management assembly 10 may further be provided with a sealing member between the first valve seat 6100 and the step of inner end wall of the valve bonnet 4000, so as to enhance the sealing performance between the first valve seat 6100 and the valve bonnet 4000. Similarly, the second valve seat 6200 is integrally formed with the first opening portion 3110, including of being fixed as a whole and being integrally formed with the first opening portion 3110. The second valve seat 6200 is fixedly arranged with the first opening portion 3110. Specifically, the second valve seat 6200 is sealingly fixed to the bottom wall of the first opening portion 3110. Specifically, a recess for accommodating the second valve seat 6200 is formed at the bottom wall of the first opening portion 3110, and a sealing member is arranged between the second valve seat 6200 and the first opening portion 3110, so as to enhance sealing performance, reduce leakage, and improve control accuracy. It should be noted here that the valve seat and the sealing member may be made into an integral structure. In other embodiments, the first valve seat 6100 may be integrally formed with the valve bonnet 4000, or in other words, the valve bonnet 4000 is provided with the first valve seat 6100. Similarly, the second valve seat 6200 may be processed and formed integrally with the valve body, and the second valve seat 6200 is formed on the bottom wall of the first opening portion 3110. The fluid management assembly 10 is provided with the first valve seat 6100 and the second valve seat 6200, so that the first valve core 5000 can be supported by the first valve seat 6100 and the second valve seat 6200, and contact parts of the first valve seat 6100 and the second valve seat 6200 with the first valve core 5000 can be slidably sealed.

The fluid management assembly 10 includes a throttle chamber. Referring to FIGS. 7 to 11 , the first valve core 5000 includes a throttle passage 5100 and a conduction passage 5200, and the throttle passage 5100 is not in communication with the conduction passage 5200. In this embodiment, the throttle passage 5100 is formed as a throttle groove, the throttle passage 5100 is recessed from the outer wall of the first valve core 5000, and the throttle passage 5100 has an opening in the outer wall of the first valve core 5000. Taking the first valve seat as an example, when the fluid management assembly is throttled, part of the opening of the throttle passage 5100 faces the matching surface 6120 of the first valve seat, and a wall forming the throttle chamber includes the matching surface of the first valve seat 6100 and a wall of corresponding throttle groove. The throttle passage 5100 includes a head end and a tail end, referring to FIG. 9 and FIG. 10 , a first surface is defined, which is perpendicular to the axis of the first opening portion 3110. It can be known that a projection 6120′ of the matching surface 6120 of the first valve seat on the first surface is an annular surface. When the fluid management assembly is throttled, a projection 5110′ of the head end on the first surface and a projection 5120′ of the tail end on the first surface are arranged on two sides of the projection 6120′ of the matching surface on the first surface in a radial direction of the projection 6120′ of the matching surface 6120 of the first valve seat. The terms “head end” and “tail end” described here refer to two ends of a bottom wall of the throttle groove or portions extending from the two ends of the bottom wall into the throttle groove, so that the head end and the tail end of the throttle groove are formed as an outlet and an inlet of the throttle chamber. In this embodiment, a cross sectional shape of the throttle passage 5100 is rectangular, as shown in FIG. 7 . The cross-sectional shape of the throttle passage 5100 may be in V-shape or other shapes. An extension direction of the throttle passage 5100 is substantially the same as a rotating direction of the first valve core 5000, or may form other angle with the rotating direction of the first valve core 5000. The throttle passage 5100 includes a first section, a second section and a third section, in which the second section includes the tail end, and the third section includes the head end. When the fluid management assembly is throttled, an opening of the first section faces the matching surface 6120 of the first valve seat, an opening of the second section faces the passage 6110 of the first valve seat, and an opening of the third section faces the first chamber 100, so that the fluid in the first chamber 100 enters the passage of the first valve seat after passing through the throttle chamber. For better understanding, referring to FIG. 10 , a projection 5130′ of the first section on the first surface is arranged within the projection 6120′ of the matching surface of the first valve seat, a projection 5140′ of the second section on the first surface is arranged within a projection 6110′ of the passage of the first valve seat, and a projection 5150′ of the third section on the first surface is arranged within a projection of the first chamber, so that the opening of the throttle chamber is relatively increased, which is beneficial for the fluid to enter the throttle chamber. Herein, the projection 5110′ of the head end is arranged within the projection of the first chamber 100, and the projection 5120 of the tail end is arranged within the projection 6110′ of the passage of the first valve seat. In another embodiment, referring to FIG. 11 , the projection 5150′ of the third section on the first surface includes two parts, which are both arranged outside the projection 6120′ of the matching surface, that is, the opening of the third section faces the first chamber. The projection 5130′ of the first section further includes two parts, which are both arranged in the projection 6120′ of the matching surface. The projection 5140′ of the second portion is arranged in the projection 6110′ of the passage of the first valve seat, so that the fluid in the first chamber 100 can enter the passage of the first valve seat through two throttle paths, which can increase the throttle passage and improve the efficiency. The wall forming the throttle chamber may be a throttle orifice. Specifically, the throttle passage may also be the throttle orifice, and the throttle passage 5100 has two openings in the outer wall of the first valve core 5000, which the two openings of the throttling orifice are the head end and the tail end of the throttle passage. When the fluid management assembly is throttling, the two openings of the throttle passage 5100 are arranged at two sides of the annular surface, one of the two openings of the throttle passage 5100 is in communication with the first chamber 100, the other one of the two openings of the throttle passage 5100 is in communication with the passage of the first valve seat 6100 or the passage of the second valve seat 6200, which will not be described in detail.

Referring to FIGS. 47 to 50 , the throttle passage 5100 is formed as a throttle groove, the walls of the throttle passage include a first bottom wall 5110 and a second bottom wall 5120, the first bottom wall 5110 is arranged intersected with the second bottom wall 5120, the “arranged intersected” here refers to that the first bottom wall 5110 and the second bottom wall 5120 have a common intersecting line or a common intersecting area, which the common intersecting area may be a rounding or chamfering between the first bottom wall 5110 and the second bottom wall 5120. The first bottom wall 5110 extends from the outer wall of the first valve core to the second bottom wall 5120, and the second bottom wall 5120 extends from the first bottom wall 5110 to the outer wall of the first valve core 5000 in an action or rotating direction of the first valve core 5000. It can be known that a wall of the head end of the throttle passage 5100 may be a part of the first bottom wall 5110, a wall of the tail end of the throttle passage 5100 may be a part of the second bottom wall 5120. Alternatively, the wall of the head end of the throttle passage 5100 may be a part of the second bottom wall 5120, and the wall of the tail end of the throttle passage 5100 may be a part of the first bottom wall 5110. In this embodiment, the first bottom wall 5110 is an arc-shaped surface, and a convexity of the first bottom wall 5110 is the same with the opening of the throttle passage 5000. The first bottom wall 5110 may be in other shape, such as a flat surface, or the combination of a flat surface and an arc-shaped surface, which will not be described in detail. Referring to FIG. 49 , the second bottom wall 5120 includes a straight section 5121 and a first arc-shaped section 5122, the first arc-shaped section 5122 extends from the outer wall of the first valve core 5000 to the straight section 5120, and the straight section 5121 is closer to a center of the first valve core 5000 than the first arc-shaped section 5122 in the radial direction of the first valve core 5000. In other embodiments, the second bottom wall 5120 may only include the first arc-shaped section 5122, and the first arc-shaped section 5122 extends from the outer wall of the first valve core 5000 toward the first bottom wall 5110. The first arc-shaped section 5122 is provided in the second bottom wall, which reduces the sharpness of a connection between the second bottom wall 5120 and the outer wall of the first valve core 5000, and can relatively reduce the wear of the matching surface of the valve seat by the first valve core 5000. Similarly, a second arc-shaped section is provided in the first bottom wall 5110, and the second arc-shaped section extends from the outer wall of the first valve core toward the second bottom wall 5120, which will not be described in detail.

In this embodiment, along the rotating direction of the first valve core 5000, a length of the opening of the throttle passage 5100 is longer than a length of the first bottom wall 5110, and the length of the opening of the throttle passage 5100 is longer than a length of the second bottom wall 5120. The opening of the throttle passage 5100 is longer than both the first bottom wall 5110 and the second bottom wall 5120, which facilitates for a processing tool to act in the throttle passage, such as facilitating the processing tool of entering or exiting the throttle passage, facilitating the processing tool of moving in the throttle passage, and reduces the difficulty of processing the first valve core 5000. Referring to FIG. 50 , the wall of the throttle passage 5100 further includes a first side wall 5130 and a second side wall, the first side wall 5130 is arranged opposite to the second side wall, the first bottom wall 5110 is arranged between the first side wall 5130 and the second side wall, the second bottom wall 5120 is arranged between the first side wall 5130 and the second side wall, the included angle between a surface where the first bottom wall 5110 is arranged and a surface where the first side wall 5130 is arranged may be 90 degrees, or greater or less than 90 degrees. Similarly, an included angle between the surface where the first bottom wall 5110 is arranged and a surface where the second side wall is arranged may be 90 degrees, or greater or less than 90 degrees. The first side wall 5130 includes a first side line 5131 and a second side line 5132, the first side line is arranged on the outer wall of the first valve core 5000, or in other words, the first side line 5131 is an intersecting line or an intersecting area between the outer wall of the first valve core 5000 and the first side wall 5130. The second side line 5132 is arranged in the first bottom wall 5110, or in other words, the second side line 5132 is an intersecting line or an intersecting area between the first bottom wall 5110 and the first side wall 5130. In this embodiment, an arc center of the first side line 5131 is arranged offset to an arc center of the second side line 5132, which facilitates the processing and formation of the throttle passage 5100. A radial distance between the first side line 5131 and the second side line 5132 decreases in the moving direction of the first valve core 5000, or in other words, a depth of the throttle groove decreases in the moving direction of the first valve core 5000; or in other words, a radial distance between the opening of the throttle passage 5100 and the first bottom wall 5110 decreases in the moving direction of the first valve core 5000. In this way, a cross-sectional area of the throttle passage 5100 decreases, that is, a fluid flowrate decreases in the moving direction of the first valve core 5000. The cross-sectional area of the throttle passage 5100 can be adjusted by adjusting a rotation angle of the first valve core 5000, so as to adjust the fluid flow rate. Furthermore, the first side line 5131 is parallel to the moving direction of the first valve core 5132 in the action direction of the first valve core 5000, so that the fluid management assembly 10 adjusts the cross-sectional area of the throttle passage 5100 by rotating the first valve core 5000, which is relatively fast and has a relatively high efficiency.

In this embodiment, referring to FIG. 48 , an included angle between the first bottom wall 5110 and the second bottom wall 5120 is a first included angle E, where the first included angle E is greater than or equal to 80 degrees and less than or equal to 160 degrees. The included angle referred to here may be an included angle between the surface where the first bottom wall 5110 is arranged and a surface where the second bottom wall 5120 is arranged, or an included angle between a tangent plane of the first bottom wall 5110 and a tangent plane of the second bottom wall 5120, or an included angle between the tangent plane of the first bottom wall 5110 and the surface where the second bottom wall 5120 is arranged, or an included angle between the tangent plane of the second bottom wall 5120 and the surface where the first bottom wall 5110 is arranged. During the rotation of the first valve core 5000, a distance between the second bottom wall 5120 and the matching surface of the valve seat gradually decreases as the distance between the tail end of the throttle passage 5100 and the matching surface of the valve seat gradually decreases. During the throttling process of the fluid management assembly, in a case that the distance between the tail end of the throttle passage 5100 and the matching surface of the first valve seat 6100 is greater than a distance between the matching surface of the first valve seat 6100 and the first bottom wall 5110, the flow adjustment of the first valve core 5000 can be performed normally. In a case that the distance between the tail end and the matching surface 6120 of the first valve seat is less than the distance between the matching surface 6120 of the first valve seat and the first bottom wall 5110, a chamber formed by the tail end of the throttle passage 5100 and the matching surface 6120 of the first valve seat is a fluid passage, and the throttling effect is relatively poor or does not meet the requirement. Therefore, the included angle between the first bottom wall 5110 and the second bottom wall 5120 is limited, so that the distance between the first bottom wall 5110 and the matching surface of the valve seat is relatively extended or the interference of the tail end is delayed, that is, the adjustment range of the throttle passage 5100 is extended, which is beneficial to improving the flow adjustment performance of the fluid management assembly.

Referring to FIGS. 7 to 9 and FIG. 39 , the fluid management assembly 10 has a conducting function, and the conduction is achieved through the conduction passage 5200. The conduction passage 5200 is formed in the first valve core 5000 and has two openings, said two openings of the conduction passage 5200 are formed in the outer wall of the first valve core 5000. When the fluid management assembly is conducted, two projections of the conduction passage 5200 are arranged at two sides of the matching surface in a radial direction of the projection of the matching surface of the valve seat. Specifically, the first valve core 5000 includes a third hole 5210 and a fourth hole 5220, a chamber formed by the third hole 5210 is in communication with a chamber formed by the fourth hole 5220, and the conduction passage 5200 of the first valve core 5000 includes the chamber formed by the third hole 5210 and the chamber formed by the fourth hole 5220. In this embodiment, an axis of the fourth hole 5220 is parallel to an axis of the valve stem 2300. An opening of the fourth hole 5220 in the outer wall of the first valve core 5000 faces away from the valve stem 2300, and an axis of the third hole 5210 is perpendicular to the axis of the valve stem 2300. In this embodiment, the first flow passage 300 has an opening in the wall of the first opening portion 3110, or in other words, the first flow passage 300 has an opening in the wall of the first chamber 100, the first flow passage 300 is in communication with the first chamber 100, and an axis of the first flow passage 300 is perpendicular to the axis of the first opening portion 3110. Correspondingly, the axis of the third hole 5210 is perpendicular to the axis of the fourth hole 5220. When the fluid management assembly 10 is in operation, the fluid in the first flow passage 300 enters the first chamber 100, and then enters the fourth hole 5220, and nextly enters the third hole 5210. In a case that an opening of the first hole 4110 is in communication with the passage 6120 of the first valve seat, the conducting function of the fluid management assembly 10 is realized. The axis of the fourth hole 5220 may be perpendicular to the axis of the valve stem 2300, so that the opening of the fourth hole 5220 can be arranged opposite to the opening of the first flow passage 300, and an opening of the third hole 5210 can be arranged opposite to the passage 6120 of the first valve seat, which can reduce the flow resistance of the fluid in the first flow passage 300 into the conduction passage 5200. It can be known that an included angle between the axis of the third hole 5210 and the axis of the fourth hole 5220 can range from 45 degrees to 135 degrees. In a case that the fluid management assembly 10 is conducted, one opening of the conduction passage 5200 is arranged opposite to the passage of the valve seat, the other opening of the conduction passage 5200 faces the first chamber, so that the communication between the first chamber 100 and the passage of the valve seat can be realized.

Referring to FIG. 3 and FIG. 39 , the valve body 3000 further includes a first passage 3120, and the first chamber 100 can be in communication with the second chamber 200 through the first passage 3120. Specifically, the first passage 3120 has two openings, the first passage 3120 is provided with a first opening 3121 of the first passage 3120 in the wall of the second chamber 200, so that the first passage 3120 is in communication with the second chamber 200. The first passage 3120 is provided with a second opening 3122 of the first passage 3120 in the bottom wall of the first opening portion 3110, so that the second opening 3122 of the first passage 3120 is in communication with the passage of the second valve seat 6200. In this embodiment, an axis of the first passage 3120 is parallel to the axis of the first opening portion 3110. The “parallel” here includes a case that the axes are overlapping, and further includes the case that an included angle between the axis of the first passage 3120 and the axis of the first opening portion 3110 is within ±10° degrees. In other embodiments, the first passage 3120 may only be of the first opening of the first passage.

In order to improve the gas-liquid separation effect of the second chamber 200, the fluid management assembly 10 further includes the conduction pipe 700. The conduction pipe 700 may be processed and formed by the same profile with the valve body 3000, or the conduction pipe 700 may be separately arranged with the valve body 3000, and then assembled together. A first port 701 of the conduction pipe 700 is arranged in the second chamber 200, and the first port 701 of the conduction pipe 700 faces the bottom wall of the second chamber 200. In this embodiment, referring to FIG. 18 , a side wall of the second chamber 200 includes a first sub-portion 230 and a second sub-portion 240, the second sub-portion 240 is arranged between a top wall of the second chamber 200 and the first port 701 of the conduction pipe 700, and the first opening 3121 of the first passage is arranged in the second sub-portion 240, which can prevent the fluid discharged from the first opening 3121 of the first passage from directly entering the second flow passage 400. Instead, after the gas-liquid separation process, the gas enters the second flow passage 400 through a chamber of the conduction pipe, and the liquid is deposited and collected on the bottom wall of the second chamber 200. In this embodiment, the first opening 3121 of the first passage is arranged in the side wall of the second chamber 200, and the farther the first opening 3121 of the first passage is from the first port 701 of the conduction pipe 700, the less likely the liquid is to be sucked away by the conduction pipe 700. Besides, the first passage 3120 may be provided with the first opening of the first passage 3120 in the top wall of the second chamber 200, or the first passage 3120 may be provided with the first opening of the first passage 3120 in the top wall and the second sub-portion of the second chamber 200.

Referring to FIG. 16 , a first cross section is defined, which is perpendicular to an axis of the conduction pipe 700, the axis of the first passage 3120 is arranged in the first cross section, and an intersecting line between a wall forming the first passage 3120 and the first cross section includes a first side line 3123 and a second side line 3124. An intersecting line between the side wall of the second chamber 200 and the first cross section is defined as a first loop line 200′, an intersecting line between an outer wall of the conduction pipe 700 and the first cross section is defined as a second loop line 700′, and the second side line 3124 is closer to the second loop line 700′ than the first side line 3123. The extension lines of the first side line 3123 and the second side line 3124 are arranged on the same side of the second loop line 700′ in a radial direction of the first loop line 200′, or in other words, the second loop line 700′ is not arranged between the extension line of the first side line 3123 and the extension line of the second side line 3124 in the radial direction of the first loop line 200′, which also includes a case that the extension line of the second side line 3124 is tangent to the first loop line and a case that the extension line of the first side line 3123 is tangent to the first loop line 200′. In this embodiment, the first loop line 200′ and the second loop line 700′ are both circular, and the first side line 3123 is parallel to the second side line 3124. It should be noted that the first loop line and the second loop line may be in arc-shape, rectangle or other shapes, and the first side line 3123 may not be parallel to the second side line 3124; the axis direction of the first loop line 200′ refers to a direction from a center or near-center area of the first loop line to the first loop line. In this way, the fluid discharged from the first passage 3120 substantial spirally flows in the second chamber 200, which extends the gas-fluid separation path, and facilitates the gas-liquid separation. In addition, the first passage 3120 is not directly facing the conduction pipe 700, and the fluid discharged from the first passage 3120 cannot directly impact the conduction pipe 700, which also facilitates the discharge of gas and liquid in the conduction pipe 700, and it is less likely for the liquid fluid to adhere to the outer wall of the conduction pipe 700. Referring to FIGS. 3, 13, and 12 , the bottom wall of the second chamber 200 includes a first bottom wall 221 and a second bottom wall 222, a distance between the second bottom wall 222 and the first port 701 of the conduction pipe 700 is greater than a distance between the first bottom wall 221 and the first port 701 of the conduction pipe 700 in an axial direction of the conduction pipe 700, so that the liquid fluid is collected on the second bottom wall 222 after the fluid is gas-liquid separated, which facilitates the liquid fluid of being collected on the second bottom wall 222, and a discharge port is provided in the second bottom wall 222, which facilitates the discharge of the liquid fluid; the first bottom wall 221 is higher than the second bottom wall 222, and there is no or only a small amount of the liquid fluid on the first bottom wall 221, the first port 701 of the conduction pipe 700 faces the first bottom wall 221, and the projection of the first port 701 of the conduction pipe 700 is all arranged within the first bottom wall 221 in the axial direction of the conduction pipe 700, which is beneficial to preventing the liquid fluid arranged on the bottom wall of the second chamber 200 from being sucked away by the conduction pipe 700. In addition, the first bottom wall 221 and the second bottom wall 222 may be processed and formed integrally or separately. In this embodiment, the second bottom wall 222 is an annular wall. The third flow passage 500 has an opening in the outer wall of the valve body. The third flow passage 500 is provided with a first opening 501 of the third flow passage 500 in the wall of the second chamber 200, the first opening 501 is arranged in the second bottom wall 222, that is, a discharge port is provided in the second bottom wall 222, and the third flow passage 500 is in communication with the second chamber 200; the third flow passage 500 has a second opening 3, that is, the third connecting port 3, of the third flow passage 500 in the outer wall of the valve body 3000. The first sub-portion 230 is arranged between the first bottom wall 221 and the second bottom wall 222 in the axial direction of the conduction pipe 700.

Referring to FIG. 18 , the valve body 3000 includes a second opening portion 3210, the third flow passage 500 includes a chamber of the second opening portion 3210, and the third flow passage 500 further includes a communication portion 520 and a throttle portion 510. Accordingly, the second opening portion 3210 has a wall 3212 forming the communication portion and a wall 3211 forming the throttle portion. The third flow passage 500 is provided with a first opening 501 of the third flow passage 500 in the second bottom wall 222 and/or the first sub-portion 230 in the axial direction of the conduction pipe 700. In one technical solution of the present disclosure, the communication portion 520 is provided with a second opening of the third flow passage 500 in the outer wall of the valve body 3000, the throttle portion 510 is provided with the first opening 501 of the third flow passage 500 in the side wall of the second chamber 200. Alternatively, the first opening 501 of the third flow passage 500 may be formed in the bottom wall of the second chamber 200 and/or the first sub-portion 230. In a case that the first opening of the third flow passage 500 is formed in the first sub-portion 230, the first opening 501 of the third flow passage 500 should be as close as possible to the second bottom wall 222, so as to facilitate the liquid fluid flowing into the third flow passage 500. In other embodiments of the technical solution of the present disclosure, the third flow passage 500 may not be provided with the throttle portion, and the third flow passage 500 only includes the communication portion 520. In that case, the third flow passage 500 only has a conducting function.

Referring to FIGS. 1, 3, 39, 12 and 13 , the valve body 3000 includes a first valve body 3100 and a second valve body 3200. The transmission device 2000 is arranged to be fixed to the first valve body 3100. The first opening portion 3110, the first passage 3120, the first flow passage 300 and the second flow passage 400 are formed in the first valve body 3100, and at least part of the third flow passage 500 are formed in the second valve body 3200. With reference to FIG. 12 and FIG. 13 , the first valve body 3100 includes a first wall 3101, the second valve body 3200 includes a second wall 3201, and the first wall 3101 is arranged in contact or with a gap to the second wall 3201. The expression “arranged with a gap” here means that a distance between the first wall 3101 and the second wall 3201 is less than or equal to 5 cm. In addition, it also belongs to the case of “arranged with a gap” if other components are provided between the first wall 3101 and the second wall 3201. The second chamber 200 includes a first sub-chamber 210 and a second sub-chamber 220. The first sub-chamber 210 is formed in the first valve body 3100, the second sub-chamber 220 is formed in the second valve body 3200, and the first sub-chamber 210 is arranged opposite to the second sub-chamber 220. The fluid management assembly 10 includes a first gap 3150 and a first sealing member, the first gap 3150 is formed as a groove, the first gap 3150 is arranged in the first wall 3101 and recessed from the first wall 3101, and the first gap 3150 surrounds an opening of the first sub-chamber 210 in the first wall 3101, or in other words, the opening of the first sub-chamber 210 in the first wall 3101 is arranged inside the first gap 3150. The first sealing member is arranged in the first gap 3150. After the first valve body 3100 and the second valve body 3200 being mounted, the first sealing member abuts against a wall of the first gap 3150 and the second wall 3201, respectively, so as to seal the second chamber 200, thereby avoiding the fluid in the second chamber 200 from leakage. Alternatively, the first gap 3150 may be formed in the second wall 3201, or formed both in the first wall 3101 and the second wall 3201, which will not be described in detail. In other embodiments, referring to FIGS. 23, 24 and 26 , the first valve body 3100 includes an embedded portion 3190, an opening of the first sub-chamber 210 is formed in the embedded portion 3190, and the embedded portion 3190 protrudes relative to the first wall 3101. Correspondingly, the second valve body 3200 includes a step portion 3290, the step portion 3290 includes a side wall of step 3291 and a bottom wall of step 3292, the side wall of step 3291 extends from the second wall 3201 toward the bottom wall of step 3292, and the bottom wall of step 3292 is parallel to the second wall 3201. The embedded portion 3190 is arranged at the step portion, and the first gap 3150 is provided between the embedded portion 3190 and the step portion. The fluid management assembly 10 is provided with the first sealing member in the first gap 3150, so as to realize the sealing between the embedded portion 3190 and the step portion, the sealing of the second chamber 200, and avoid the fluid in the second chamber 200 from leakage. Alternatively, the embedded portion 3190 may be arranged in the second valve body 3200, and the step portion may be arranged in the first valve body 3100, which will not be described in detail.

The first valve body 3100 includes a first through hole 3130, the first through hole 3130 is provided with a first opening of the first through hole 3130 in the wall of the first opening portion, the first through hole 3130 is provided with a second opening of the first through hole 3130 in the first wall 3101, and the first opening of the first through hole 3130 is arranged opposite to the opening of the second hole 4120, or in other words, the first opening of the first through hole 3130 is arranged opposite to the second opening of the first communication passage 4300, and the first through hole 3130 is in communication with the first communication passage 4300. The second valve body 3200 includes a second through hole 3220, the second through hole 3220 is provided with a first opening of the second through hole 3220 in the second wall 3201, the second through hole 3220 is provided with a second opening of the second through hole 3220 in the second opening portion 3210, the second through hole 3220 is in communication with a chamber formed by the second opening portion 3210, the first opening of the first through hole 3130 is arranged opposite to the first opening of the second through hole 3220, and the first through hole 3130 is in communication with the second through hole 3220.

The fluid management assembly 10 further includes the fourth flow passage, which can be in communication with the first chamber 100. In this embodiment, the fourth flow passage includes the passage 6110 of the first valve seat, the first communication passage 4300, the first through hole 3130 and the second through hole 3220, and an opening of the fourth flow passage is arranged in the wall 3212 of the communication portion, or in other words, the fluid in the fourth flow passage enters the third flow passage 500 and then is discharged through the third flow passage 500. Referring to FIG. 12 and FIG. 13 , the fluid management assembly 10 further includes a second gap 3140 and a second sealing member, and the second sealing member is arranged in the second gap 3140, so as to achieve sealing. In this embodiment, the second gap 3140 is formed as a groove and arranged in the first wall 3101 and recessed from an end of the first wall 3101, and the second gap 3140 surrounds an outer circumference of the second opening of the first through hole 3130, or in other words, the second opening of the first through hole 3130 is arranged inside the second gap 3140. The second sealing member is provided in the second gap 3140, and the second sealing member abuts against a wall of the second gap 3140 and the second wall 3201, respectively. The second sealing member may be of a sealing ring or a solder, so as to prevent internal being leakage. Alternatively, the second gap 3140 may be formed in the second wall 3201, or the second wall 3201 may be formed in the first wall 3101 and the second wall 3201, and the second gap 3140 of the first valve body 3100 may be arranged opposite to or staggered with the second gap 3140 of the second valve body 3200, which will not be described in detail.

In other embodiments, referring to FIG. 23 and FIG. 24 , the fluid management assembly 10 further includes a first connecting pipe 3170, which is integrated with one of the first valve body 3100 and the second valve body 3200, such that one end of the first connecting pipe 3170 is arranged in the first through hole 3130 or the second through hole 3220 and forms a second gap 3140 therewith, and the second sealing member is arranged in the second gap 3140, which facilitates assembly and reduce the risk of leakage. In this embodiment, the first connecting pipe 3170 is integrated with the first valve body 3100. In other embodiments, the first connecting pipe 3170 is separately arranged with the first valve body 3100 and the second valve body 3200, one end of the first connecting pipe 3170 is arranged in the first through hole, and the other end of the first connecting pipe 3170 is arranged in the second through hole. A second gap is provided between the first connecting pipe 3170 and the first through hole, and a second gap is present between the first connecting pipe 3170 and the second through hole, the fluid management assembly 10 is provided with the second sealing member in the second gap 3140, so as to realize the sealing between the first connecting pipe 317 and the first through hole and between the first connecting pipe 317 and the second through hole.

In order to secure the first valve body 3100 and the second valve body 3200, in this embodiment, a first mounting hole is provided in one of the first valve body 3100 and the second valve body 3200, and a first penetrating through hole is provided in other one of the first valve body 3100 and the second valve body 3200, so as to cooperate with the first mounting hole. Generally, an axis of the first mounting hole is parallel to the axis of the conduction pipe 700. The fluid management assembly 10 further includes a first fastener, the first fastener extends into the first penetrating through hole and the first mounting hole, and the first valve body 3100 and the second valve body 3200 are fastened by the first fastener. Under the action of the first fastener, the first wall closely abuts against the second wall, or the first wall closely abuts against the second wall by other members and is secured to the second wall by another fastener, and the fastener may include a component such as a bolt, etc. for fastening.

Referring to FIG. 17 , the first communication passage 4300 includes a chamber of the first hole 4110 and a chamber of the second hole 4120. The axis of the first hole 4110 coincides with the axis of the second hole 4120. Alternatively, the axis of the first hole 4110 may be arranged parallel to the axis of the second hole 4120, and the chamber of the first hole 4110 is in communication with the chamber of the second hole 4120. The opening of the second hole 4120 is formed in the outer end wall 4010 of the valve bonnet, that is, an opening of the fourth flow passage in the outer end wall of the valve bonnet, or in other words, a fourth connecting port 4, so that the first through hole 3130 does not need to be provided in the first valve body 3100, and the second through hole 3220 does not need to be provided in the second valve body 3200, which facilitates mounting and reducing internal leakage. In that case, the fourth flow passage 600 includes the passage of the first valve seat 6100 and the first communication passage 4300, and the fourth flow passage does not need to share an outlet with the third flow passage. When the fluid management assembly is throttled and conducted at the same time, the fluid in the third flow passage and the fluid in the fourth flow passage cannot be mixed. In this embodiment, the fluid management assembly includes a first groove and a sealing member, the sealing member is arranged in the first groove, and the first groove is recessed relative to the side wall of the valve bonnet and distributed in a circumferential direction of the side wall of the valve bonnet, or the first groove is recessed relative to the first opening portion and distributed in a circumferential direction of the first opening portion. The fluid management assembly 10 includes a valve port portion and a second valve core, the third flow passage 500 includes a chamber formed by the valve port portion, or in other words, the chamber formed by the valve port portion is a part of the third flow passage 500, and the second valve core can abut against the valve port portion, so as to block the third flow passage 500. In this embodiment, referring to FIGS. 3, 14 and 15 , the fluid management assembly 10 further includes a check valve component 7000, and the check valve component 7000 is arranged in the chamber formed by the second opening portion 3210. Specifically, the second opening portion 3210 is provided with a mounting portion 3213, and the mounting portion 3213 is arranged between the communication portion 520 and the throttle portion 510. The check valve component 7000 includes a valve supporting seat 7100 and a second valve core 7200, at least part of the valve supporting seat 7100 is arranged in a chamber formed by the mounting portion 3213, and the mounting portion 3213 is fixedly connected to the valve supporting seat 7100 and a connection between the mounting portion and the valve supporting seat 7100 is sealed. In a specific embodiment, the matching portion 3111 is provided with an internal thread in the first opening portion 3110, the mounting portion 3213 has an internal thread, a matching portion of the valve supporting seat 7100 is formed as an external thread, and the internal thread of the mounting portion 3213 cooperates with the external thread of a fixing portion, so as to secure the check valve component 7000 with the second opening portion 3210. A groove for placing a sealing member is provided in the matching portion of the valve supporting seat 7100 or the mounting portion 3213, so as to realize the sealing between the valve supporting seat 7100 and the second opening portion 3210. In other embodiments, the mounting portion 3213 has a step for limiting the valve supporting seat 7100 and a groove for placing a snap ring, and the step and the snap ring of the mounting portion 3213 are configured to realize the fixation of the valve supporting seat 7100. The valve supporting seat 7100 includes a hole for valve core stem, a communication hole 7110 and a stop portion 7130, and the valve supporting seat 7100 is further provided with a valve port portion 7120. The valve port portion 7120 is arranged at a side of the valve supporting seat 7100 close to the communication portion 520, and the stop portion 7130 is arranged at a side of the valve supporting seat 7100 close to the throttle portion 510. Both the hole for valve core stem and the communication hole 7110 extend through the valve supporting seat 7100 in an axial direction of the second opening portion 3210. The second valve core 7200 includes a valve core stem 7230, a first end 7210 and a second end 7220, and the first end 7210 and the second end 7220 are arranged integrally or welded into a whole with the valve core stem 7230. Both the first end 7210 and the second end 7220 protrude relative to the valve core stem 7230 in the axial direction of the second opening portion 3210, or in other words, outer diameters of the first end 7210 and the second end 7220 are greater than an outer diameter of the valve core stem 7230, the valve core stem 7230 is arranged in the valve core stem hole, and the valve core stem 7230 is slidable in the valve core stem hole. The first end 7210 and the second end 7220 are arranged at two sides of the valve supporting seat 7100, the first end 7210 is relatively adjacent to the communication portion 520, and the second end 7220 is relatively adjacent to the throttle portion 510. One end of an elastic member 7300 abuts against the second end 7220, and the other end of the elastic member 7300 abuts against the stop portion 7130. The check valve component 7000 is provided with the elastic member 7300, which facilitates the resetting of the second valve core 7200. In this embodiment, the elastic member 7300 is of a spring. The first end 7210 has a first abutment area 7211, the communication hole 7110 has a communication port in an outer end wall of the valve supporting seat 7100, and the valve port portion 7120 is distributed in a circumferential direction of the communication port. In other embodiments, the valve port portion 7120 may be formed as a wall of the communication portion. When the fluid management assembly is in operation, in a case that a pressure of the throttle portion 510 is lower than a pressure of the communication portion 520, the second valve core 7200 is arranged in a first position, the first abutment area 7211 abuts against the valve port portion 7120, and the communication hole 7110 is not in communication with the communication portion 520, so that the third flow passage 500 is blocked; in a case that the pressure of the throttle portion 510 is higher than the pressure of the communication portion 520, the second valve core 7200 is arranged in a second position, the first abutment area 7211 is separated from the valve port portion 7120, the elastic member 7300 is poressed by the second end, the second valve core is limited by the stop portion from further moving toward the communication portion, the valve port portion 7120 is opened by the second valve core 7200, the communication hole is in communication with the communication portion 520, so that the third flow passage 500 is conducted.

Referring to FIGS. 38 to 42 and FIG. 3 , when the fluid management assembly 10 is in operation, the first valve core 5000 is rotatable in the first chamber 100, an operation position of the first valve core 5000 at least includes a first operation position and a second operation position. In the technical solution of this embodiment, the first flow passage 300 serves as a passage for the fluid to enter the first chamber 100, and the fourth flow passage serves as one of the passages for the fluid to flow out of the first chamber 100. The fourth flow passage includes the passage 6110 of the first valve seat, the chamber of the first hole 4110, the chamber of the second hole 4120, a chamber of the first through hole 3130 and a chamber of the second through hole 3220. The first communication passage 4300 includes the chamber of the first hole 4110 and the chamber of the second hole 4120; the first passage 3120 is another passage for the fluid to flow out of the first chamber 100, and the fluid in the first chamber 100 can enter the second chamber 200 through the first passage 3120. After the fluid in the second chamber 200 being gas-liquid separated, the second flow passage 400 serves as a passage for the gas to flow out of the second chamber 200, and the third flow passage 500 serves as a passage for the liquid to flow out of the second chamber 200. Specifically, referring to FIG. 40 and FIG. 3 , the fluid enters the first chamber 100 through the first flow passage 300. In the first operation position of the first valve core 5000, the conduction passage 5200 of the first valve core is in communication with the passage 6110 of the first valve seat, the first valve core 5000 blocks a passage between the first chamber 100 and the passage of the second valve seat 6200, so that the second chamber 200 is not in communication with the first chamber 100, the fluid in the first chamber 100 leaves the first chamber 100 through the fourth flow passage, and enters the communication portion 520 of the third flow passage 500, and then is discharged from the fluid management assembly 10 through the communication portion 520, and the fluid management assembly 10 is only a passage of the fluid in that case. In the second operation position of the first valve core 5000, referring to FIG. 3 and FIG. 41 , the first chamber 100 is in communication with the second chamber 200, the throttle passage 5100 of the first valve core 5000 communicates a passage between the first chamber 100 and the second valve seat 6000, the fluid in the first chamber 100 enters the second chamber 200 after being throttled by the throttle passage 5100, and the throttled fluid is gas-liquid separated in the second chamber 200, the gaseous fluid enters the second flow passage 400 through the conduction pipe 700 and is discharged out of the fluid management assembly 10, and the liquid fluid enters the third flow passage 500 through the first opening 501 of the third flow passage and is discharged out of the fluid management assembly 10 through the third flow passage 500. In that case, the fluid management assembly 10 has throttling and gas-liquid separation functions. In a case that the third flow passage 500 further includes the throttle portion 510, the fluid management assembly 10 further has a secondary throttling effect on the fluid.

In other embodiments, the operation position of the first valve core 5000 of the fluid management assembly 10 further includes a third operation position and a fourth operation position. In the third operation position of the first valve core 5000, referring to FIG. 39 and FIG. 3 , the first valve core 5000 blocks the first chamber 100 not to be in communication with the passage of the second valve seat 6200, and the throttle passage 5100 communicates the first chamber 100 with the passage 6110 of the first valve seat. Further, the first chamber 100 is in communication with the fourth flow passage through the throttle passage 5100. The fluid in the first chamber 100 enters the fourth flow passage after being throttled through the throttle passage 5100, then enters the communication portion 520 of the third flow passage 500, and is then discharged out of the fluid management assembly 10 through the communication portion 520. The fourth flow passage includes the passage 6110 of the first valve seat, the chamber of the first hole 4110, the chamber of the second hole 4120, the chamber of the first through hole 3130 and the chamber of the second through hole 3220. In the fourth operation position of the first valve core 5000, referring to FIG. 42 and FIG. 3 , the first valve core 5000 blocks the first chamber 500 not to be in communication with the passage 6110 of the first valve seat, the throttle passage 5100 communicates the first chamber 100 with the passage of the second valve seat 6200. Further, the first chamber 100 is in communication with the second chamber 200. The fluid entering the second chamber 200 is gas-fluid separated, the gaseous fluid is discharged out of the fluid management assembly 10 through the second flow passage 400, and the liquid fluid is discharged out of the fluid management assembly 10 through the third flow passage 500. In that case, the fluid management assembly 10 has throttling and gas-liquid separation functions. In a case that the third flow passage 500 further includes the throttle portion 510, the fluid management assembly 10 further has a secondary throttling effect on the fluid.

Referring to FIG. 27 and FIG. 28 , the second valve body 3200 includes a third opening portion 3240, and the third opening portion 3240 is recessed relative to a wall of the second valve body 3200. In this embodiment, the third opening portion 3240 is recessed from a wall of the second valve body toward the second wall 3201, the third opening portion 3240 includes a large-diameter portion 3241, a small-diameter portion 3242 and a flat portion 3243, the flat portion 3243 connects the large-diameter portion 3241 and the small-diameter portion 3242, and the small-diameter portion 3242 has an opening in the wall of the communication portion 520. In this embodiment, the third flow passage 500 includes a second passage 3250, the second passage 3250 is provided with a first opening 501 of the third flow passage 500 in the wall of the second chamber 200, the second passage 3250 has an opening in the third opening portion, the second passage 3250 communicates a chamber formed by the second chamber 200 and the third opening portion 3240, and an axis of the second passage 3250 is arranged to be inclined relative to the axis of the conduction pipe. Referring to FIG. 27 , at least part of the second passage 3250 is formed as a throttle portion, an equivalent diameter of the throttle portion is about 1.4 mm, or it may be in other sizes, as long as it can realize the fluid throttling. The fluid management assembly further includes a solenoid valve portion and a valve chamber, the solenoid valve portion includes a valve supporting seat 7100′ and a sleeve portion 8600, the valve supporting seat 7100′ is provided with a center hole extending through the valve supporting seat, one end of the valve supporting seat 7100′ is fixedly connected to the third opening portion 3240 and a connection between the valve supporting seat 7100′ and the third opening portion 3240 is sealed, and the fixing manner may be welding or screw fixing. The solenoid valve portion includes a second valve core 7200′ and an elastic member 7300′. In this embodiment, the second valve core 7200′ is of a piston, the piston has a piston hole, and the piston is slidable in the valve chamber. In this embodiment, a wall forming the valve chamber includes a partial wall of the large-diameter portion 3241 and a wall of the valve supporting seat 7100′. The valve supporting seat 7100′ includes a guiding wall, at least part of the piston is arranged in a chamber formed by the guiding wall, the guiding wall of the valve supporting seat 7100′ is slidably connected to a side wall of the piston, and the other part of the piston is arranged in a chamber enclosed by the large-diameter portion 3241. One end of the elastic member 7300′ abuts against the flat portion 3243, and the other end of the elastic member 7300′ abuts against the piston. The fluid management assembly 10 further includes a coil assembly 8500 and an iron core assembly. The iron core assembly includes a moving iron core 9200, a static iron core 9300 and a sleeve portion 8600, and one end of the sleeve portion is arranged in a center hole of the valve supporting seat 7100′ and is sealingly fixed to a hole wall of the center hole of the valve supporting seat 7100′. At least part of the static iron core 9300 is arranged in the sleeve portion and fixed to the sleeve portion, at least part of the moving iron core 9200 is arranged in the sleeve portion and is movable relative to the static iron core 9300, and the moving iron core 9200 can relatively seal the piston hole. The static iron core 9300 is farther away from the valve supporting seat 7100′ than the moving iron core 9200, and the coil assembly 8500 is sleeved on an outer circumference of the sleeve portion 8600. When the fluid management assembly is in operation, after the coil assembly 8500 being energized, the excitation magnetic field generated by the coil assembly 8500 can drive the moving iron core 9200 to move, the moving iron core 9200 abuts against the piston and relatively seals the piston hole, the piston is moved toward the valve port portion, and the piston seals the valve port portion, so that the communication portion 520 is not in communication with the second chamber 200. In this embodiment, the valve port portion is the flat portion 3242 or a wall of the small-diameter portion 3242. In a case that the fluid flows out of the second chamber through the third flow passage, the second passage has a throttling effect, and the solenoid valve portion opens the third flow passage. In other cases, when the pressure of the communication portion is higher than the pressure of the throttle portion, the solenoid valve is closed.

Referring to FIG. 28 , compared with the technical solution shown in FIG. 27 , the difference is in that: the second passage 3250 is formed as the communication portion 520 or a part of the communication portion 520, an equivalent diameter of the second passage is about 3 mm, or the equivalent diameter may be other sizes. In this embodiment, the second valve core 7200″ is of a valve needle, or the second valve core 7200″ may be in other forms of valves. The fluid management assembly 10 further includes a transmission mechanism 8300, a rotor portion 8400 and a valve core guiding portion. In this embodiment, the transmission mechanism 8300 is a thread-driving transmission mechanism, the thread-driving transmission mechanism includes a movable portion and a fixed portion, one of the movable portion and the fixed portion includes a screw rod, and the other one of the movable portion and the fixed portion includes a nut threaded with the screw rod, the movable portion is assembled with the valve needle, and the fixed portion can be directly or indirectly fixed to the valve seat. The valve core guiding portion is relatively fixed to the valve supporting seat 7100″ and can guide the second valve core 7200″, so as to prevent an axial movement of the second valve core 7200″ from deviating. The valve port portion is formed in the valve supporting seat 7100″, and in other embodiments, it may be formed in the valve core guiding portion. Alternatively, the valve port portion may be formed in the small-diameter portion 3242, and the second valve core 7200″ is substantially coaxial with the valve port portion. When the fluid management assembly 10 is in operation, the coil assembly 8500 is electrically connected to a control circuit which controls the coil assembly 8500. When the coil assembly 8500 is energized, the excitation magnetic field generated by the coil assembly 8500 can drive the rotor portion 8400 to rotate, and further drive the valve needle to move by the thread-driving transmission mechanism 8300. When the rotor portion 8400 rotates, the screw rod is driven by the rotor portion 8400 to rotate relative to the nut due to the effect of pitch, so as to realize the rotation and axial movement. In addition, the valve needle is relatively fixed to the screw rod, so that the valve needle can move axially with the screw rod, and a gap between the valve needle and the valve port portion becomes larger or smaller, and the throttling to refrigerant is realized. It can be known that a gap between the second valve core 7200″ and the valve port portion is formed as a throttle portion. Alternatively, the transmission mechanism 8300 may be a gear-driving transmission mechanism 8300, the second valve core may have a spherical or quasi-spherical structure, and the movement of the second valve core relative to the valve seat or a connecting body may be in a relative rotation.

Referring to FIG. 29 and FIG. 30 , compared with the embodiment shown in FIG. 17 , the valve body 3000 includes a main body 3300 and a block body 3400, the main body 3300 includes the first opening portion 3110, the second opening portion 3210 and the first flow passage 300, and the first flow passage 300 is provided with the first connecting port 1 on an outer wall of the main body 3300. The main body 3300 includes a fourth opening portion 3310, the fourth opening portion 3310 is recessed from an upper wall of the main body 3300 toward an interior of the main body 3300, the fourth opening portion 3310 has an opening on the upper wall of the main body 3300, and the fourth opening portion 3310 includes a mounting wall 3311 and a side wall 3312 of the second chamber. The mounting wall 3311 is relatively close to the opening of the fourth opening portion, and the first passage 3120 is provided with the first opening 3121 of the first passage 3120 on the side wall 3312 of the second chamber. The second flow passage extends through the block body 3400, the block body 3400 has a matching wall, and the matching wall of the block body 3400 is sealingly fixed to the mounting wall 3312. Specifically, the matching wall of the block body 3400 has an external thread, the mounting wall is formed as an internal thread, and the external thread of the block body 3400 cooperates with the internal thread of the mounting wall, so as to realize the fixation of the block body 3400 and the main body 3300. A gap is present between the block body 3400 and the mounting wall, and a sealing member is arranged in the gap, so as to realize the sealing between the block body 3400 and the mounting wall. The conduction pipe 700 is integrated with the block body 3400, or the block body 3400 may be separately arranged with the conduction pipe 700. In this embodiment, the valve bonnet 4000 includes the first communication passage 4300, the first communication passage 4300 has the opening on the inner end wall of the valve bonnet 4000, and the first communication passage 4300 has a fourth connecting port 4 on an outer end wall 4010 of the valve bonnet. In another embodiment, the fourth opening portion is recessed from a lower wall of the main body 3300 toward the interior of the main body, the fourth opening portion 3310 has an opening on the lower wall of the main body 3300, an inner wall of the block body 3400 is formed as the bottom wall of the second chamber, a bottom wall of the fourth opening portion is formed as the top wall of the second chamber, and the second flow passage is formed in the main body. The valve body includes the main body 3300 and the block body 3400, compared with the solution shown in FIG. 3 , the processing and assembly are relatively simple.

Referring to FIGS. 19 to 26 , the difference from the solution shown in FIG. 3 is that: the first connecting port 1 is formed on the second valve body 3200, the opening of the first flow passage 300 on the wall of the first chamber 100 is arranged on a lower side of the first valve core 5000, that is, a side opposite to the valve stem 2300, which can reduce the lateral impact of the fluid on the first valve core 5000, and is beneficial to maintaining the stability of the first valve core 5000. Specifically, the first flow passage 300 includes a first sub flow passage 310 and a second sub flow passage 320. The first sub flow passage 310 is arranged in the first valve body 3100, the second sub flow passage 320 is arranged in the second valve body 3200, the first sub flow passage 310 has openings on the first wall 3101 and the first opening portion 3110, the first sub flow passage 310 is provided with a first opening of the first sub flow passage 310 on the first wall 3101, the first sub flow passage 310 is provided with a second opening of the first sub flow passage 310 on the wall of the first chamber 100, the second opening of the first sub flow passage 310 and the valve stem 2300 are arranged on the two sides of the first valve core 5000, the first sub flow passage is in communication with the first chamber 100, so that when the fluid in the first flow passage enters the first chamber, the lateral impact on the first valve core is reduced, which is beneficial to the stability of the first valve core. The “lateral” here refers to a direction perpendicular to the valve stem. The second sub flow passage 320 is provided with a first opening of the second sub flow passage 320 on the second wall 3201, and the second sub flow passage 320 also has an opening on an outer wall of the second valve body 3200. In this embodiment, the first valve body 3100 includes a first hole portion 3160, a chamber of the first hole portion 3160 forms part of the first sub flow passage 310, the second valve body 3200 includes a second hole portion 3230, a wall forming the second sub flow passage 320 includes the second hole portion 3230 and a third hole portion 3270, and the second hole portion 3230 is recessed from the second wall 3201 toward the interior of the second valve body 3200, or in other words, a chamber formed by the second hole portion 3230 is provided with the first opening of the second sub flow passage 320 on the second wall 3201. The third hole portion 3270 has an opening on a side wall of the second valve body, and the chamber formed by the second hole portion 3230 is in communication with a chamber formed by the third hole portion 3270. In this embodiment, an axis of the second hole portion 3230 is perpendicular to an axis of the third hole portion 3270, or the axis of the second hole portion 3230 may form another included angle with the axis of the third hole portion 3270. The fluid management assembly includes a third gap 3260 and a third sealing member, and the third sealing member is arranged in the third gap 3260. The fluid management assembly includes a second connecting pipe 3180, the second connecting pipe 3180 is integrated with the first valve body 3100, one end of the second connecting pipe 3180 is arranged in the chamber formed by the second hole portion 3230, the second hole portion 3230 forms the third gap 3260 with the second connecting pipe, and the second connecting pipe 3180 is integrally formed with the first valve body 3100, which facilitates assembly and reduces the risk of leakage. Alternatively, the second connecting pipe 3180 may be integrated with the second valve body 3200, which will not be described in detail. In other embodiments, one end of the second connecting pipe 3180 is located in the first hole portion 3160, the other end of the second connecting pipe is arranged in the second hole portion 3230, a third gap is present between the second connecting pipe 3180 and the first hole portion 3160, and a third gap 3260 is present between the second connecting pipe 3180 and the second hole portion 3230, and the fluid management assembly 10 is provided with the third sealing members in the third gaps 3260, so as to realize the sealing between the second connecting pipe 3180 and the first hole portion 3160 and between the second connecting pipe 3180 and the second hole portion 3230. It can be known that the fluid management assembly 10 may not include the second connecting pipe, the third gap 3260 is formed as a groove, the third gap 3260 is recessed relative to the first wall, the third gap 3260 surrounds an outer circumference of the first opening of the first hole portion 3160, or in other words, the first opening of the first hole portion 3160 is arranged inside the third gap 3260. The third sealing member is provided in the third gap 3260, and the third sealing member respectively abuts against a wall of the third gap 3260 and the second wall 3201. The third sealing member may be a sealing ring or a solder, so as to prevent internal leakage. Alternatively, the third gap 3260 may be formed on the second wall 3201, or the third gap 3260 may be both formed on the first wall 3101 and the second wall 3201. The third gap 3260 of the first valve body 3100 may be arranged opposite to or staggered with the third gap 3260 of the second valve body 3200, which will not be described in detail. The second valve body further includes a fourth hole portion 3280, the fourth hole portion 3280 is provided with the third connecting port 3 on the outer wall of the second valve body 3200, an axis of the fourth hole portion 3280 is perpendicular to the axis of the second opening portion 3210, and a chamber formed by the fourth hole portion 3280 is in communication with the chamber formed by the second opening portion 3210. Accordingly, the fluid management further places a plug on the fourth opening portion, so as to prevent the fluid from flowing out of the opening of the second opening portion. In this embodiment, the third connecting port 3 and the first connecting port 1 are arranged on the same outer wall of the second valve body, which facilitates the communication between the fluid management assembly and other components. The third flow passage includes the chamber formed by the second opening portion 3210 and the chamber formed by the fourth hole portion 3280. The chamber formed by the fourth hole portion 3280 is in communication with the chamber formed by the second through hole 3220, so that the fourth flow passage is in communication with the third flow passage.

A thermal management system will be described below. Referring to FIG. 31 , in a specific embodiment of the thermal management system, a vehicle thermal management system is taken as example, and the fluid in the thermal management system is generally a refrigerant. The thermal management system includes a compressor 40, a fluid management assembly 10, a first heat exchanger 20 and a second heat exchanger 50. The compressor 40 includes an outlet 41, a first inlet 42 and a second inlet 43. The first inlet 42 is a low-pressure inlet, and the second inlet 43 is a relatively high-pressure inlet. The first heat exchanger 20 can be in communication with the outlet 41 of the compressor, and a high-temperature and high-pressure refrigerant releases heat in the first heat exchanger 20 to heat gas flowing through the first heat exchanger 20, which increases the temperature of the airflow. The second heat exchanger 50 is arranged at a front end of a vehicle, and the front end of the vehicle here refers to a position of the second heat exchanger 50 capable of exchanging heat with ambient air. Specifically, the refrigerant can release heat to or absorb heat from the ambient air in the second heat exchanger 50, and the second heat exchanger 50 can exchange heat with the ambient air. The thermal management system further includes a third heat exchanger 30, and a throttling unit 70 is arranged in front of a refrigerant inlet of the third heat exchanger 30. The refrigerant absorbs the heat of the airflow flowing through the third heat exchanger 30 after the refrigerant is throttled by the throttling unit 70, which reduces the temperature of the airflow. The first heat exchanger 20 and the third heat exchanger 30 are arranged in an air duct of an air-conditioning case of the vehicle, and the first heat exchanger 20 is arranged in a downwind direction of the third heat exchanger 30. When the thermal management system is in operation, the refrigerant in the first heat exchanger 20 and the refrigerant in the third heat exchanger 30 exchange heat with the airflow in the air-conditioning case, which adjusts the temperature of the airflow in the air-conditioning case, and further adjusts the temperature of a passenger compartment. The structure and description of the fluid management assembly 10 can make reference to FIGS. 1 to 30 and the above description, which will not be described in detail. Referring to FIGS. 31, 3 and 39 , in the technical solution of the this embodiment, a refrigerant outlet of the first heat exchanger 20 is in communication with the first connecting port 1 of the fluid management assembly, the second inlet 43 of the compressor is in communication with the second connecting port 2 of the fluid management assembly 10, a first port of the second heat exchanger 50 is in communication with the third connecting port 3 of the fluid management assembly 10, and a second port of the second heat exchanger 50 can be in communication with the first inlet 42 of the compressor 40 or with the first inlet 42 of the compressor 40 through a gas-liquid separator 80. In this embodiment, the thermal management system is provided with a shut-off valve 60, the shut-off valve 60 is arranged between the second port of the second heat exchanger 50 and the first inlet 42 of the compressor, so as to control whether the second port of the second heat exchanger 50 is in communication with the first inlet 42 of the compressor or not. The second port of the second heat exchanger 50 can also be in communication with the third heat exchanger 30 through the throttling unit 70, and a refrigerant outlet of the third heat exchanger 30 is in communication with the first inlet 42 of the compressor or with the first inlet 42 of the compressor via the gas-liquid separator 80. The thermal management system further includes a temperature flap. In a direction of the airflow, the temperature flap is arranged between the first heat exchanger 20 and the second heat exchanger 50, and the temperature flap can open or close or adjust a heat exchange area of the first heat exchanger 20, so as to control the heat exchange amount of the first heat exchanger 20.

In other embodiments, the thermal management system further includes a refrigerant system, a first coolant system and/or a second coolant system. The first heat exchanger 20 and/or the second heat exchanger 50 are/is a dual-passage exchanger, one of the flow passages is a refrigerant flow passage, and the refrigerant flow passage is a part of the refrigerant system, and the other one of the flow passages is a coolant flow passage. The first coolant system includes a coolant flow passage of the first heat exchanger 20, a first pump 201 and a fourth heat exchanger 202, the coolant flow passage of the first heat exchanger 20, the first pump 201 and the fourth heat exchanger 202 are communicated in series, and the fourth heat exchanger 202 is arranged in the air duct of the air-conditioning case. The second coolant system includes a coolant flow passage of the third heat exchanger 30, a second pump 301 and a fifth heat exchanger 302, the coolant flow passage of the third heat exchanger 30, the second pump 301 and the fifth heat exchanger 302 are communicated in series, and the fifth heat exchanger 302 is arranged in the air duct of the air-conditioning case. Taking the first coolant system as an example, the refrigerant of the refrigerant system exchanges heat with the coolant of the first coolant system in the first heat exchanger 20, so as to adjust the temperature of the coolant of the first coolant system, and the coolant of the first coolant system exchanges heat with the airflow in the air-conditioning case in the fourth heat exchanger 202, so as to adjust the temperature of the airflow in the air-conditioning case, which further adjusts the temperature of the passenger compartment. Similarly, the situation of the second coolant system is the same as the above content, which will not be described in detail. Referring to FIG. 33 , the embodiment shown in FIG. 33 is a case where the thermal management system includes the refrigerant system, the first coolant system and the second coolant system. In this embodiment, the fourth heat exchanger 202 is arranged in a downwind direction of the fifth heat exchanger 302, and the first pump 201 and the second pump 301 are used to control whether the first coolant system and the second coolant system participate in heat exchange.

The thermal management system includes a heating mode and a cooling mode, and the heating mode includes at least one of a first heating mode, a second heating mode and a third heating mode. Referring to FIG. 34 and FIG. 41 , in the first heating mode of the thermal management system, the first valve core is in the second operation position, that is, the first chamber 100 is in communication with the second chamber 200. Specifically, the first chamber 100 is in communication with the second chamber 200 through the throttle passage 5100. The refrigerant with high-temperature and high-pressure releases heat in the first heat exchanger 20, and the refrigerant which releases heat in the first heat exchanger 20 enters the first flow passage 300 through the first connecting port 1 and then enters the first chamber 100 through the first flow passage 300. Due to the throttling of the throttle passage 5100, the gas-liquid mixed refrigerant is gas-fluid separated in the second chamber 200, the gaseous refrigerant flows through the second flow passage 400, enters the second inlet 43 of the compressor through the second connecting port 2, and is involved in the next cycle. The liquid refrigerant in the second chamber 200 passes through the third flow passage 500 and enters the first port of the second heat exchanger 50 through the third connecting port 3, the refrigerant evaporates and absorbs heat in the second heat exchanger 50, and the refrigerant which has absorbed heat enters the first inlet 42 of the compressor or enters the first inlet 42 of the compressor via the gas-liquid separator 80. In this embodiment, the fluid management assembly 10 has the throttling and gas-liquid separation functions. The gaseous refrigerant in the second chamber enters the second inlet 43 of the compressor, which has the effect of supplementing gas and increasing enthalpy, and is beneficial to improving the heating performance of the thermal management assembly. It should be emphasized here that the first heating mode includes at least two cases as following: in the first case, the third flow passage 500 only includes the communication portion 520, that is, the third flow passage only has a function of communicating, the refrigerant in the second chamber 200 enters the communication portion with the pressure of the refrigerant being constant or with a small pressure difference, or in other words, the pressure of the refrigerant in the second chamber is the same as the pressure of the communication portion or the pressure change is small; in the second case, the third flow passage 500 includes the communication portion 520 and the throttle portion 510, the refrigerant in the second chamber 200 enters the communication portion after being secondary throttled and depressurized by the throttle portion 510, the refrigerant after being secondary throttled and depressurized enters the second heat exchanger 50, which improves the absorption performance of the refrigerant in the second heat exchanger 50, and is further beneficial to improving the heating performance of the first heat exchanger 20.

Referring to FIG. 37 and FIG. 39 , in the second heating mode of the thermal management system, the first valve core 5000 is in the third operation position, that is, the throttle passage 5100 communicates the first chamber 100 with the fourth flow passage 600. The refrigerant with high-temperature and high-pressure releases heat in the first heat exchanger 20, the refrigerant which releases heat in the first heat exchanger 20 enters the first flow passage 300 through the first connecting port 1, and enters the first chamber 100 through the first flow passage 300. Due to the throttling of the throttle passage 5100, the relatively liquid refrigerant enters the first port of the second heat exchanger 50 through the fourth flow passage 600 and the third connecting port 3, the refrigerant evaporates and absorbs heat in the second heat exchanger 50, and the refrigerant which has absorbed heat enters the first inlet 42 of the compressor or enters the first inlet 42 of the compressor via the gas-liquid separator 80.

Referring to FIG. 36 and FIG. 42 , in the third heating mode of the thermal management system, the first valve core 5000 is in the fourth operation position, that is, the conduction passage 5200 communicates the first chamber 100 with the second chamber 200. The refrigerant with high-temperature and high-pressure releases heat in the first heat exchanger 20, the refrigerant which releases heat in the first heat exchanger 20 enters the first flow passage 300 through the first connecting port 1, and enters the first chamber 100 through the first flow passage 300, the refrigerant arranged in the first chamber 100 enters the second chamber 200 through the conduction passage 5200, the refrigerant passing through the second chamber is gas-liquid separated, the gaseous refrigerant enters the second inlet 43 of the compressor through the second flow passage and is involved in the next circle, the liquid refrigerant enters the first port of the second heat exchanger 50 through the third flow passage and the third connecting port 3, the refrigerant evaporates and absorbs het in the second heat exchanger 50, and the refrigerant which has absorbs heat enters the first inlet 42 of the compressor or enters the first inlet 42 of the compressor via the gas-liquid separator 80. It should be emphasized here that the third heating mode includes the following two cases: in the first case, the third flow passage 500 only includes the communication portion 520, that is, the third flow passage only has a function of communicating, the refrigerant in the second chamber 200 enters the second heat exchanger 50 and releases heat in the second heat exchanger 50. At this time, the third heating mode is applied to a case of the defrosting of the second heat exchanger 50; in the second case, the third flow passage 500 includes the communication portion 520 and the throttle portion 510, the refrigerant in the second chamber 200 enters the communication portion after being throttled and depressurized by the throttle portion 510, the refrigerant after being throttled and depressurized enters the second heat exchanger 50, and the refrigerant absorbs heat in the second heat exchanger 50. At this time, the third heating mode is applied to a case where the demanding for heating by the first heat exchanger 20 is not high.

Referring to FIG. 35 and FIG. 40 , in the cooling mode of the thermal management system, the first valve core 5000 is in the first operation position, that is, the conduction passage 5200 communicates the first chamber 100 with the fourth flow passage 600. The temperature flap is closed, the first heat exchanger 20 performs a small amount of heat exchange or no heat exchange, the refrigerant enters the first flow passage 300 through the first connecting port 1, and enters the first chamber 100 through the first flow passage 300, the refrigerant arranged in the first chamber 100 enters the fourth flow passage through the conduction passage 5200, and then enters the second heat exchanger 50 through the third connecting port 3. The refrigerant with high-temperature and high-pressure releases heat in the second heat exchanger 50, the throttling unit 70 is switched on, the refrigerant enters the third heat exchanger 30 after being throttled by the throttling unit 70, the relatively liquid refrigerant absorbs heat in the second heat exchanger 50 for reducing the temperature in the air-conditioning case, and the refrigerant which has absorbs heat enters the first inlet 42 of the compressor or enters the first inlet 42 of the compressor via the gas-liquid separator 80, and participates in the next circle.

In other embodiments of the thermal management system, referring to FIG. 32 , compared with the first embodiment of the thermal management system, the thermal management system does not include the third heat exchanger 30, the second port of the second heat exchanger 50 is only in communication with the first inlet 42 of the compressor or with the first inlet 42 of the compressor via the gas-liquid separator 80. It can be known that, in this embodiment, the thermal management system only has a heating mode, and does not have a cooling mode. It should be noted that the thermal management systems with above two forms are taken as an example and do not limit the concept of the present application. The heating modes in some thermal management systems are the same with or equivalent to the above heating mode, which should belong to the protection scope of the present application.

It should be noted that the above embodiments are only used to illustrate the present application, and not to limit the technical solution described according to the present application, such as the definition of directionality such as “front”, “rear”, “left”, “right”, “up” and “down”. This specification has described the present application in detail with reference to the above embodiments, however, those skilled in the art should understand that they can still combine, modify or equivalently replace the present application, and all technical solutions and improvements that do not depart from the spirit and scope of the present application should be covered within the scope claimed by the claims of the present application. 

What is claimed is:
 1. A fluid management assembly, comprising a valve body and a first valve core, wherein the fluid management assembly further comprises a first chamber and a second chamber, a wall forming the second chamber comprises an inner wall of the valve body; the first valve core is arranged in the first chamber, the first valve core is rotatable in the first chamber, the first valve core is provided with a conduction passage, the fluid management assembly comprises a throttle chamber, and the throttle chamber or the conduction passage is configured to communicate the first chamber with the second chamber; and wherein the fluid management assembly comprises a first flow passage, a second flow passage, a third flow passage and a fourth flow passage, the first flow passage, the second flow passage and the third flow passage have openings in an outer wall of the valve body, the first flow passage is in communication with the first chamber, and the conduction passage or the throttle chamber is configured to communicate the fourth flow passage with the first chamber; the second flow passage is in communication with the second chamber, and the third flow passage is provided with a first opening of the third flow passage in the wall of the second chamber.
 2. The fluid management assembly according to claim 1, wherein the valve body comprises a first opening portion, a wall of the first chamber comprises a partial wall of the first opening portion; the valve body comprises a first passage, the first passage is provided with a first opening of the first passage in the wall of the second chamber, the first opening of the first passage is arranged above the first opening of the third flow passage, and the first passage is provided with a second opening of the first passage on a bottom wall of the first opening portion.
 3. The fluid management assembly according to claim 1, wherein the valve body comprises a second opening portion, the second opening portion has an opening in the outer wall of the valve body, the third flow passage comprises a chamber formed by the second opening portion, the chamber formed by the second opening portion comprises a communication portion, and the communication portion is configured to be in communication with the first opening of the third flow passage.
 4. The fluid management assembly according to claim 3, wherein the second opening portion is provided with the first opening of the third flow passage in the wall of the second chamber; the third flow passage comprises a throttle portion, the second opening portion comprises a mounting portion and a wall of the throttle portion, the mounting portion is arranged between the throttle portion and the communication portion, the fluid management assembly comprises a valve supporting seat, and the valve supporting seat is relatively fixed to the mounting portion; and the throttle portion is arranged between the first opening of the third flow passage and the communication portion, or the throttle portion is provided with the first opening of the third flow passage in the wall of the second chamber.
 5. The fluid management assembly according to claim 3, wherein the valve body further comprises a third opening portion and a second passage, the third opening portion comprises a large-diameter portion, a small-diameter portion and a flat portion, the flat portion connects the large-diameter portion and the small-diameter portion, the small-diameter portion has an opening in a wall of the communication portion, and the large-diameter portion has an opening in the outer wall of the valve body; the large-diameter portion comprises a mounting portion, the fluid management assembly further comprises a valve chamber and a valve supporting seat, the valve supporting seat is relatively fixed to the mounting portion, and a wall forming the valve chamber comprises a wall of the large-diameter portion and a wall of the valve supporting seat; and the second passage is provided with the first opening of the third flow passage in the wall of the second chamber, and the second passage has an opening in the wall of the valve chamber.
 6. The fluid management assembly according to claim 4, wherein the valve body comprises a main body and a block body, the main body comprises the first opening portion, the second opening portion and the first flow passage, and the first flow passage is provided with an opening in an outer wall of the main body; the main body comprises a fourth opening portion, at least part of the block body is arranged in a chamber formed by the fourth opening portion, the fourth opening portion has a mounting wall, the block body has a matching wall, the mounting wall is fixedly connected to the matching wall and a connection between the mounting wall and the matching wall is sealed, the wall of the second chamber comprises a side wall of the fourth opening portion and an inner wall of the block body; the first passage of the valve body is provided with the first opening of the first passage in the side wall of the fourth opening portion, the inner wall of the block body is formed as a top wall of the second chamber, the second flow passage extends through the block body, a bottom wall of the fourth opening portion is formed as at least part of a bottom wall of the second chamber, and the third flow passage is provided with the first opening of the third flow passage in the side wall of the fourth opening portion and/or in the bottom wall of the fourth opening portion; or the inner wall of the block body is formed as the bottom wall of the second chamber, the second flow passage is formed in the main body, and the third flow passage is provided with the first opening of the third flow passage in the side wall of the fourth opening portion and/or in a bottom wall of the block body.
 7. The fluid management assembly according to claim 4, wherein the valve body comprises a first valve body and a second valve body, the first valve body comprises a first wall, the second valve body comprises a second wall, the first wall is arranged in contact or with a gap to the second wall; the first valve body is arranged above the second valve body, the first valve body is provided with the first opening portion, the second flow passage, the first passage of the valve body and a top wall of the second chamber, the second valve body is provided with a bottom wall of the second chamber, and the second opening portion is arranged on the second valve body; and the second chamber comprises a first sub-chamber and a second sub-chamber, the first valve body forms the first sub-chamber, the second valve body forms the second sub-chamber, an opening of the first sub-chamber in the first wall is opposite to an opening of the second sub-chamber in the second wall, the first opening of the first passage is arranged in a wall of the first sub-chamber, the first opening of the third flow passage is arranged in a wall of the second sub-chamber; a bottom wall of the second sub-chamber comprise a first bottom wall and a second bottom wall, and the first bottom wall is closer to the first sub-chamber relative to the second bottom wall.
 8. The fluid management assembly according to claim 4, wherein the fluid management assembly further comprises a valve port portion, a second valve core and the valve supporting seat; the valve body comprises a third opening portion, the third opening portion comprises a large-diameter portion, a small-diameter portion and a flat portion, the flat portion connects the large-diameter portion and the small-diameter portion, the small-diameter portion has an opening in a side wall of the communication portion, the large-diameter portion comprises the mounting portion, at least part of the valve supporting seat is arranged in a chamber formed by the mounting portion, a connection between the mounting portion and the valve supporting seat is sealed; the fluid management assembly further comprises a valve chamber, and a wall forming the valve chamber comprises a wall of the large-diameter portion and a wall of the valve supporting seat; the throttle portion is provided with the first opening of the third flow passage in the wall of the second chamber, the throttle portion has an opening in the wall of the valve chamber, the throttle portion is configured to communicate the second chamber with the valve chamber; the fluid management assembly comprises a coil assembly, a moving iron core, and a static iron core, the moving iron core is movable relative to the static iron core, the second valve core is movable in the valve chamber, the valve port portion is formed as the flat portion or the small-diameter portion, and the second valve core is configured to close or open the valve port portion; or the third flow passage comprises a second passage, the second passage has openings both in the wall of the second chamber and in the wall of the valve chamber, the second passage is configured to communicate the second chamber and the valve chamber; the valve port portion is formed in the valve supporting seat or in a guiding portion of the second valve core, or the valve port portion is formed in the small-diameter portion, and a gap between the second valve core and the valve port portion forms the throttle portion.
 9. The fluid management assembly according to claim 2, wherein the fluid management assembly comprises a valve seat, the valve seat has a matching surface corresponding to the first valve core; the throttle chamber is not in communication with the conduction passage, a wall forming the throttle chamber comprises a throttle groove, the throttle groove is recessed relative to an outer wall of the first valve core, when the fluid management assembly is throttled, part of an opening of the throttle groove faces the matching surface; wherein the throttle groove comprises a head end and a tail end, a first surface is defined, which is perpendicular to an axis of the first opening portion, wherein the head end, the tail end and the matching surface have projections in the first surface, and when the fluid management assembly is throttled, the projection of the tail end and the projection of the head end are arranged at two sides of the projection of the matching surface in a radial direction of the projection of the matching surface; or the wall forming the throttle chamber comprises a throttle orifice, the throttle orifice has two openings in the outer wall of the first valve core, and when the fluid management assembly is throttled, one opening of the throttle orifice is in communication with the first chamber, and the other opening of the throttle orifice is in communication with a passage of the valve seat.
 10. The fluid management assembly according to claim 9, wherein the throttle groove is recessed relative to the outer wall of the first valve core, the throttle groove comprises a first section, a second section and a third section, one of the second section and the third section comprises the head end, the other one of the second section and the third section comprises the tail end, and when the fluid management assembly is throttled, an opening of the first section faces the matching surface, an opening of the second section faces the passage of the valve seat, and an opening of the third section faces the first chamber.
 11. The fluid management assembly according to claim 10, wherein a bottom wall of the throttle groove comprises a first bottom wall and a second bottom wall, the first bottom wall is arranged intersected with the second bottom wall, and wherein, in a moving direction of the first valve core, a length of the opening of the throttle groove is longer than a length of the first bottom wall, and the length of the opening of the throttle groove is longer than a length of the second bottom wall; wherein an included angle between the length of the first bottom wall and the length of the second bottom wall is defined as a first included angle, the first included angle is greater than or equal to 80 degrees and less than or equal to 160 degrees.
 12. The fluid management assembly according to claim 11, wherein a wall forming the throttle groove comprises a first side wall and a second side wall, the first side wall is arranged opposite to the second side wall, the first bottom wall is arranged between the first side wall and the second side wall, the second bottom wall is arranged between the first side wall and the second side wall, and wherein, in the moving direction of the first valve core, the second bottom wall extends from the outer wall of the first valve core to the first bottom wall, and the first bottom wall extends from the second bottom wall to the outer wall of the first valve core; and the first side wall has a first side line and a second side line, the first side line is also arranged in the outer wall of the first valve core, the second side line is also arranged in the first bottom wall, and a radial distance between the first side line and the second side line decreases in the moving direction of the first valve core.
 13. The fluid management assembly according to claim 1, wherein the valve body comprises a second opening portion, the second opening portion has an opening in the outer wall of the valve body, the third flow passage comprises a chamber formed by the second opening portion, the chamber formed by the second opening portion comprises a communication portion, and the communication portion is configured to be in communication with the first opening of the third flow passage.
 14. A fluid management assembly, comprising a valve body and a first valve core, wherein the fluid management assembly comprises a first chamber and a second chamber, the second chamber is formed in the valve body; the first valve core is arranged in the first chamber, the first valve core is rotatable in the first chamber, wherein the fluid management assembly is provided with a throttle chamber, and the first chamber is configured to be in communication with the second chamber through the throttle chamber; and the fluid management assembly comprises a first flow passage, a second flow passage and a third flow passage, the first flow passage is in communication with the first chamber; the second flow passage is in communication with the second chamber; the third flow passage is provided with a first opening of the third flow passage on a wall of the second chamber; the third flow passage comprises a communication portion, the communication portion is provided with a second opening of the third flow passage in an outer wall of the valve body; the fluid management assembly further comprises a throttle portion, and the throttle portion is a part of the third flow passage.
 15. The fluid management assembly according to claim 14, wherein the valve body comprises a first opening portion and a second opening portion, the second opening portion comprises a wall of the communication portion, the throttle portion is arranged between the first opening of the third flow passage and the communication portion, or the throttle portion is provided with the first opening of the third flow passage on the wall of the second chamber.
 16. The fluid management assembly according to claim 15, wherein the fluid management assembly comprises a second valve core and a valve supporting seat, the second valve core is movable relative to the valve supporting seat; the second opening portion comprises a mounting portion and a wall of the throttle portion, the mounting portion is arranged between the throttle portion and the communication portion, at least part of the valve supporting seat is arranged in a chamber formed by the mounting portion, a connection between the mounting portion and the valve supporting seat is sealed, the valve supporting seat comprises a valve port portion, and the third flow passage is blocked by the cooperation of the second valve core with the valve port portion. 